The validity of a waiver of the right to appeal a sentence, included in a plea agreement, is the primary issue in this case. Appellant James Bushert also appeals various other sentencing issues and the denial of his motion to withdraw his guilty plea. The government contends that the appeal as to his sentence should be denied because Bus-hert’s plea agreement included a waiver of his right to appeal his sentence. We hold that sentence appeal waivers, made knowingly and voluntarily, are enforceable. Nevertheless, we consider the merits of the sentencing claims in this case because we conclude that Bushert’s waiver was not knowingly and voluntarily made.
I.
One of Bushert’s co-defendants, Frederick Albury, headed a cocaine distribution organization in Tampa. Albury was unable to contact his regular supplier of cocaine, Grillo. Knowing that Bushert was familiar with both Grillo and Grillo’s source of cocaine, Albury approached Bushert in the hope that Bushert could obtain cocaine for Albury. Although Bushert’s attempts to locate cocaine were unsuccessful, Albury was able to get thirty kilograms of cocaine from another source and paid Bushert for his efforts. Bushert knew that most of the cocaine Albury obtained was cooked into crack cocaine.
A grand jury in Florida returned an indictment against Bushert and five co-defendants charging them with conspiracy to possess with intent to distribute cocaine and possession with intent to distribute crack cocaine. The defendants also were charged with operating an establishment used to manufacture crack cocaine. The defendants’ motions to suppress evidence that had been obtained through electronic surveillance were denied. At approximately the same time, all defendants entered into plea negotiations with the government. Bushert’s co-defendants reached plea agreements with the government that reserved the right to appeal the denial of their motions to suppress. 1 Bus-hert’s negotiations with the government became protracted, however, because the government believed that Bushert was not being completely truthful.
Eventually, Bushert reached an agreement with the government. That agreement stated that Bushert would plead guilty to Count One of a Superseding Information, charging him with conspiracy to possess with intent to distribute 30 kilograms of cocaine. Bushert agreed to cooperate with the government and the government agreed to “consider” whether such cooperation qualified as substantial assistance under section 5K1.1 of the Sentencing Guidelines. 2 The plea agreement stated that the decision as to whether or not the government would file a 5K1.1 motion rested solely with the government. Bushert agreed that “he cannot and will not challenge that decision, whether by appeal, collateral attack or otherwise.”
The plea agreement also included a general appeal waiver provision. This provision read that the “[defendant knowingly and voluntarily agrees to waive his right to appeal or contest, directly or collaterally, his sentence on any ground, unless the Court should impose a sentence in excess of the statutory maximum or otherwise impose a sentence in violation of law apart from the sentencing guidelines.” 3
*1346 At Bushert’s re-arraignment, the district court conducted a colloquy pursuant to Fed. R.Crim.P. 11. The court told Bushert that it needed to know if he made his plea “freely and voluntarily, without threats, force or promise except the promises contained in the four corners of this plea agreement.... If I ask you any question you don’t understand, stop me and I’ll explain to you.” 4 Throughout the colloquy, the court elicited answers from Bushert that he was not under the influence of any drugs, had never been treated for a mental illness, knew where he was and knew to what charge he was pleading guilty. 5 Bushert testified that no promises were made to him other than the promises recited in the plea agreement. 6 The court informed Bushert of his various rights, including his right to a jury trial and the right against self-incrimination. The court also discussed appeals.
THE COURT: Do you understand that you’re losing the right to appeal regarding the charges in this case, however, you do retain the right to question whether you’re entering this plea freely and voluntarily, whether the Court has jurisdiction to take your plea. But other than that you’re losing your appeal right, do you understand that?
THE DEFENDANT: Yes, Your Honor. 7
The court also discussed appeals in the context of the Sentencing Guidelines.
THE COURT: Do you also understand that under some circumstances you or the government may have the right to appeal any sentence that the Court imposes, do you understand that?
THE DEFENDANT: Yes, Your Honor. 8
The court then questioned Bushert’s attorney concerning various issues. Finally, the court specifically found that Bushert understood what he was doing and that the plea was “not produced by risk, force or promise except those promises dictated into the record in the plea agreement.” 9 After finding that the plea was entered freely and voluntarily, the court accepted Bushert’s guilty plea. 10
Two months later, Bushert filed a motion to withdraw his plea under Fed.R.Crim.P. 32(d), alleging that the government had promised orally that he would get the “same deal” as his co-defendants. The co-defendants retained the right to appeal the denial of the suppression motion; the plea agreement Bushert signed purports to waive all appellate rights. A magistrate judge reviewed this claim and made several findings of fact. The magistrate found that immediately prior to his re-arraignment, Bushert reviewed his plea agreement but that he did not have time to compare it with his co-defendants’ agreements. 11 The magistrate concluded that an evidentiary hearing was not required because Bushert provided no affidavits, 12 and because at the re-arraignment, Bushert had indicated that there were no promises outside the plea agreement. The magistrate recommended that Bushert’s motion to withdraw his guilty plea be denied. Although Bushert contested this report, the district court adopted the magistrate’s report and recommendation.
At the sentencing hearing, Bushert’s new counsel asserted that the government had acted in bad faith by refusing to file a 5K1.1 substantial assistance departure motion. Although Bushert withdrew his request for an evidentiary hearing on this matter, he notes that he did not waive the bad faith argument. The district court also considered and resolved Bushert’s objections to the PSI and heard testimony on the government’s proposed obstruction of justice enhancement. The court gave Bushert an obstruction of justice enhancement and an acceptance of responsibility downward departure. The *1347 court sentenced Bushert to 151 months of imprisonment, followed by 5 years of supervised release.
II.
A.
Bushert raises six issues on appeal. Before addressing these issues, we first consider the government’s claim that Bushert’s purported waiver of his right to appeal his sentence (“sentence appeal waiver”), as stated in his plea agreement, prevents him from contesting his sentence. This is an issue of first impression in this circuit.
There is no question that a defendant who enters a guilty plea waives numerous constitutional rights.
Boykin v. Alabama,
Plea bargains serve many significant and valid purposes. For example, they save the government time and money.
[Wjhen the state enters a plea bargain with a criminal defendant, it receives immediate and tangible benefits, such as promptly imposed punishment without the expenditure of prosecutorial resources. Also, the defendant’s agreement to plead to some crime tends to ensure some satisfaction of the public’s interest in the prosecution of crime and confirms that the prosecutor’s charges have a basis in fact.
Newton v. Rumery,
By its terms, the appeal waiver in this case only applied to Bushert’s sentence. Accordingly, an appeal going to the heart of the plea — such as the one Bushert makes in his appeal from the denial of his Rule 32(d) motion that his plea was not made voluntarily — would not be affected by the waiver. The waiver of the right to appeal one’s sentence implicates a different set of concerns than a plea of guilty, which waives the bundle of constitutional rights discussed above.
There is no constitutional right to appeal.
Jones v. Barnes,
At least five other circuits have addressed this issue. All have enforced sentence appeal waivers.
See United States v. Melancon,
In Wiggins, the district court had gone to great lengths during the Fed.R.Crim.P. 11 hearing to verify that the defendant understood the meaning of the waiver he was about to sign. Id. “On two separate occasions during the plea hearing, the district court reminded ... [the defendant] that he was waiving his right to appeal his sentence even though its exact length was as yet undetermined.” Id. at 53. The Wiggins defendant stated that he had discussed the situation with his attorney and understood how the Sentencing Guidelines might be applied to his case. Id. at 54.
The Fourth Circuit refined its jurisprudence in this area in
United States v. Wessells,
The Ninth Circuit also has enforced sentence appeal waivers. In
Navarro-Botello,
the defendant agreed to waive his right to appeal his sentence if the sentence imposed was within the Guidelines range calculated by the parties.
The Ninth Circuit rejected the argument made by the defendant that his waiver was involuntary because it gave up “unknown” appeal rights.
Id.
The
Navarro-Botello
court analogized this situation to a case in which the Supreme Court allowed an individual to waive the right to file a 42 U.S.C. § 1983 action in return for the prosecutor dismissing pending criminal charges.
Id.
(citing
Newton v. Rumery,
Adopting the rationale of
Newton
and
Wiggins,
the
Navarro-Botello
court held that it would enforce voluntary and intelligent sentence appeal waivers.
In
United States v. Bolinger,
Recently, another panel of the Ninth Circuit, diverging from the Fourth Circuit, refused to require a Rule 11 colloquy in order to enforce a waiver of appeal rights.
United States v. DeSantiago-Martinez,
On appeal, the defendant had objected because the district court did not address the sentence appeal waiver at the Rule 11 hearing. The
DeSantiago-Martinez
court rejected that argument.
The Eighth Circuit, when confronted with this issue, reviewed the importance of plea agreements to such concerns as the finality of judgments and sentences.
Rutan,
The Rutan court cited the Fourth Circuit line of cases and concluded that if a sentence appeal waiver is made knowingly and voluntarily, it is enforceable. Id. 15 The court also followed Navarro-Botello in holding that a sentence appeal waiver “would not prevent an appeal where the sentence imposed is not in accordance with the negotiated agreement.” Id. at 830. In deciding to enforce sentence appeal waivers, the Eighth Circuit rejected the argument that sentence appeal waivers should not be enforced because a “defendant cannot knowingly and voluntarily *1350 waive an unknown right.” Id. The court deemed this argument baseless, stating that such an accusation could just as easily be brought against guilty pleas generally because by pleading guilty a defendant waives his right to a trial. “An accused does not know that the government will be able to prove its case, how witnesses will testify, or that he will be able to competently represent himself, yet he may freely waive his right to jury trial, to confront witnesses, and to counsel.” Id. at 830 n. 2. The Rutan court stated that it was enough for the defendant to know he had a right to appeal and to understand that he was waiving that right. Id. at 830.
The final court to address sentence appeal waivers was the Fifth Circuit.
Melancon,
We agree with the basic reasoning of our sister circuits that sentence appeal waivers may be enforced. However, just as a guilty plea must be made knowingly and voluntarily to be effective,
Boykin v. Alabama,
B.
A defendant’s waiver of the right to appeal his sentence does not mean, however, that appellate review is completely unavailable.
17
Even a defendant who has executed an effective waiver does not “subject himself to being sentenced entirely at the whim of the district court.”
Id.
18
Our endorsement
*1351
of sentence appeal waivers is secured by the underpinning that for a waiver to be effective it must be knowing and voluntary.
Marin,
District court observance of Rule 11 is vital to the effective functioning of our criminal justice system. Compliance with Rule 11 is designed to ensure that a “plea of guilty and the ensuing conviction comprehend all of the factual and legal elements necessary to sustain a binding, final judgment of guilt and a lawful sentence.”
United States v. Broce,
This court recently reaffirmed the general propositions of
Dayton. United States v. Zickert,
We conclude that -the defendant’s knowledge and understanding of the sentence appeal waiver is one of the components that constitutes-the “core concern” of the defendant’s right to “be aware of the direct consequences of his guilty plea.”
Id.
at 668. We agree with the
Marin
court’s holding that “a waiver is not knowingly or voluntarily made if the district court fails to specifically question the defendant concerning the waiver provision of the plea agreement during the Rule 11 colloquy and the record indicates that the defendant did not otherwise understand the full significance of the waiver.”
In order to prevail in its argument that this court should enforce a sentence appeal waiver, the government need only demonstrate one of the two Marin items. The government must show that either (1) the district court specifically questioned the defendant concerning the sentence appeal waiver during the Rule 11 colloquy, or (2) it is manifestly clear from the record that the defendant otherwise understood the full significance of the waiver. 20
*1352
We reject the view of the
DeSantiago-Martinez
court that an examination of the text of the plea agreement is sufficient to find the waiver knowing and voluntary.
Without a manifestly clear indication in the record that the defendant otherwise understood the full significance of the sentence appeal waiver, a lack of sufficient inquiry by the district court during the Rule 11 hearing will be error. Therefore, in most circumstances, for a sentence appeal waiver to be knowing and voluntary, the district court must have engaged the defendant about the sentence appeal waiver during the Rule 11 hearing.
. III.
A.
With that foundation laid, we turn to an examination of the. case at bar in order to determine whether to enforce Bushert’s purported sentence appeal waiver. The volun-tariness of a guilty plea is a question of law reviewed
de novo. Marshall v. Lonberger,
In this case, the district court did not specifically address the issue of the sentence appeal waiver in the Rule 11 hearing. The district court did inform Bushert that he was waiving his right to appeal the charges against him. In contrast, during the Rule 11 hearing, the court also informed Bushert that he might have the right to appeal his sentence under some circumstances: “Do you also understand that under some circumstances you or the government may have the right to appeal any sentence that the Court imposes, do you understand that?” 21
The district court’s language here was confusing. ' It is true that even under the terms of the sentence appeal waiver, Bushert could appeal his sentence under some circumstances. The district court’s statement, however, did not clearly convey to Bushert that he was giving up his right to appeal under *1353 most circumstances. The statement the district court made to Bushert could have been made—and indeed would have been more appropriate if it had been made—to a defendant who had not signed a sentence appeal waiver. Defendants who do not sign sentence appeal waivers at all may appeal under some circumstances; they may appeal under the circumstances provided for in 18 U.S.C. § 3742(a). The district court’s generalization that the defendant could appeal his sentence under some circumstances was insufficient. It is not manifestly clear that Bushert understood he was waiving his appeal rights. Nor does a thorough review of the record yield any indication that Bushert otherwise understood the full significance of his sentence appeal waiver.
We conclude that the district court’s Rule 11 colloquy was deficient for failure to discuss sufficiently with Bushert his sentence appeal waiver. We hold that that failure was error.
B.
No court has explicitly discussed the rationale for determining the remedy the court should apply when a sentence appeal waiver is determined not to have been made knowingly and voluntarily.
22
The Fourth Circuit case of
Wessells,
however, is informative. In
Wessells,
the Fourth Circuit determined that there was no Rule 11 inquiry concerning the sentence appeal waiver and that the defendant did not “knowingly agree to an absolute waiver of all rights to appeal his sentencing.”
Thus, it appears that the Fourth and Fifth Circuits’ remedy for an unknowing and involuntary waiver is essentially severance. The improper part of the defendant’s plea agreement—the unknowing and involuntary sentence appeal waiver—is severed or disregarded by the appellate court while the remainder of the plea agreement is enforced as written and the appeal goes forward. We agree with the remedy chosen by the other circuits.
By imposing the severance remedy, Bushert will get the benefit of the deal he thought he struck. Moreover, a severance remedy for an unknowing and involuntary sentence appeal waiver is not inconsistent with this court’s precedent in
United States v. Zickert,
Bushert’s situation may be distinguished from that of the defendant in Zickert. Unlike Zickert, there is a remedy available in the instant case that is less drastic than allowing the defendant to replead yet will allow the defendant to receive the full benefit of his plea bargain as he understood it. Severing the appeal waiver would correct the only violation of a Rule 11 core concern in this case—that Bushert was not aware of the direct consequences of his guilty plea. In short, we believe that our Rule 11 jurisprudence must distinguish the concerns posed by an involuntary and unknowing guilty plea from those raise by an involuntary and unknowing sentence appeal waiver. In the latter case but not the former, severance is both practical and adequate to preserve the defendant’s rights.
We understand that the government may have given Bushert a better deal because of the inclusion of the sentence appeal waiver
*1354
than Bushert could have obtained without the sentence appeal waiver.
See, e.g., Rutan,
IV.
We now consider the merits of Bushert’s five claims of sentencing errors: that the district court erred (1) in calculating his base offense level; (2) in not finding him a minor or minimal participant under the Sentencing Guidelines; (3) in enhancing his sentence under the Sentencing Guidelines for obstruction of justice; (4) in not reducing his sentence because of his substantial assistance; and (5) in sentencing him to the same amount of time in prison as an “organizer” of the conspiracy.
None of these contentions are meritorious. First, appellant asserts that the district court made a mistake in attributing 30 kilograms of cocaine to his offense. But Bushert has not demonstrated, as he must to prevail, that the district court’s factual findings with respect to the calculation of the base offense level were clearly erroneous.
United States v. Burton,
Appellant objects to the district court’s refusal to reduce his sentence in light of his alleged substantial assistance in accordance with his plea agreement.
24
He contends that the government acted in bad. faith in declining to file the necessary U.S.S.G. § 5K1.1 substantial-assistance motion. In
Wade v. United States,
— U.S. -,
[Wade] does not claim that the Government-motion requirement is itself unconstitutional, or that the condition is superseded in this case by any agreement on the Government’s behalf to file a substantial-assistance motion, cf. Santobello v. New York,404 U.S. 257 , 262-263,92 S.Ct. 495 , *1355 498-499,30 L.Ed.2d 427 (1971); United States v. Conner,930 F.2d 1073 , 1075-1077 (CA4), cert. denied, 502 U.S. -,112 S.Ct. 420 ,116 L.Ed.2d 440 (1991).
— U.S. at -,
Finally, Bushert contends that the district court erred by sentencing him to a term in prison as long or longer than some of his allegedly more involved co-conspirators. Nevertheless, even Bushert acknowledges that there is precedent in this circuit that states that challenges to sentencing because a co-defendant received a less severe penalty are “frivolous.”
United States v. Hendrieth,
V.
In addition to Bushert’s sentencing claims, he also contends that he should have been allowed to withdraw his guilty plea pursuant to Fed.R.Crim.P. 32(d).
26
Rule 32(d), in pertinent part, states that “[i]f a motion for withdrawal of a plea of guilty ... is made before sentence is imposed, the court may permit withdrawal of the plea upon a showing by the defendant of any fair and just reason.” Although this portion of the rule is to be liberally construed, there is no absolute right to withdraw a guilty plea before sentence is imposed.
United States v. Buckles,
In his Rule 32(d) motion, Bushert contended primarily that his plea was not entered knowingly and voluntarily because he did not realize that his “plea agreement did not include a reservation of the right to appeal the Court’s ruling on the legality of a wire tap.” 27 Bushert claimed that the absence of this reservation of right was contrary to his agreement with the government to receive the “same deal” as his co-defendants whose plea agreements preserved the right to appeal the denial of their suppression motions. The district court, adopting the magistrate’s report and recommendation, denied the Rule 32(d) motion.
Bushert’s co-defendants exercised the reservation of right that Bushert tried to obtain through his motion to withdraw his plea. These co-defendants appealed the suppression order to the Eleventh Circuit. This court affirmed without opinion the district court’s denial of the motions to suppress.
United States v. Albury,
The Ninth Circuit addressed an analogous issue in
United States v. Schaff,
948 F.2d
*1356
501, 506 (9th Cir.1991). In
Schaff,
the defendant appealed the propriety of a jury instruction given in his trial. The Ninth Circuit previously had upheld the relevant jury instruction in an appeal by Schaffs co-defendant.
Id.
The
Schaff
court rejected the defendant’s claim by relying on law of the case. Noting that the doctrine of law of the case concerned “ ‘the continued application of a rule of law previously determined in the same case,’” the
Schaff
court then cited
United States v. Tierney,
The analogy between Schaff and the instant case is strong. Bushert raised his objection to the evidence the district court refused to suppress by moving to adopt the motions made by his co-defendants. 28 Bus-hert wanted to withdraw his guilty plea so that he could appeal this denial of the suppression motion in the same manner that his co-defendants could appeal the denial. Had Bushert been given the opportunity to withdraw his plea so that he could then appeal the suppression, his appeal would have been unsuccessful. Although Bushert and his co-defendants were not convicted at the same trial, their joint motions for suppression were denied in the same proceeding and they then pled guilty. We therefore conclude that this objection is moot.
VI.
Accordingly, we AFFIRM.
Notes
. These defendants did appeal and a panel of this court affirmed the district court’s denial without opinion.
United States v. Albury,
. Section 5K1.1 of the Sentencing Guidelines reads, in part, that "[u]pon a motion of the government stating that the defendant has provided substantial assistance in the investigation or prosecution of another person who has committed an offense, the court may depart from the guidelines.”
.Rl-193-4.
. R7 at 5.
. R7 at 12.
. R7 at 15.
. R7 at 16 (emphasis added).
. R7 at 18.
. R7 at 21.
. R7 at 22.
. RlSupp-242-4.
. Bushert claims that affidavits were filed after the magistrate's recommendation was submitted to the district court.
. The Eleventh Circuit in
Bonner
v.
City of Prichard,
. Bushert’s plea agreement also contains such a provision. R7 at 5.
. The sentence appeal waiver in Rutan only prevented appeals under 18 U.S.C. § 3742(a). As such, the court noted that 28 U.S.C. § 2255 habeas corpus relief was still available to the Rutan defendant. A plain reading of the sentence appeal waiver in the instant case reveals that Bushert’s waiver, if enforced, would prohibit habeas relief as to his sentence as well.
. The “knowing” component is consistent with binding precedent in this circuit which holds that in order for a waiver to be valid, it must be informed.
Arrastia v. United States,
. Even judicially enforced, knowing and voluntary sentence appeal waivers as broad as Bus-hert's — which include á .waiver of collateral appeal of his sentence — would not prevent á collateral § 2255 action concerning certain subjects.
See United States v. Abarca,
. For example, there are certain fundamental and immutable legal landmarks within which the district court must operate regardless of the existence of sentence appeal waivers. As the
Marin
court wrote, "a defendant could not be said to have waived his right to appellate review of a sentence imposed in excess of the maximum penalty provided by statute or based on a constitutionally impermissible factor such as race."
Id.
It is both axiomatic and jurisdictional that a court of the United States may not impose a penalty for a crime beyond that which is authorized by statute.
See United States v. White,
*1351 We do not decide these matters today, however, because they are not presented in the instant case.
. The
Marin
court’s framing of this requirement is consistent with the Supreme Court’s statement in
Johnson v. Zerbst,
This is also consistent with the Fifth Circuit’s holding in
United States v. Baty,
. We are not conflating statutory rights and constitutional rights here. We reiterate that the right to appeal is solely a statutory right. That recognition does not make any difference in this context, however, because the waiver of a right— whether constitutional or statutory — must be knowingly and voluntarily made.
See, e.g., Gil
*1352
more
v.
Utah,
Moreover, the commonly understood meaning of "waiver” supports this view. See Black's Law Dictionary 1417 (5th Ed.1979). Black's defines "waiver” as the "intentional or voluntary relinquishment of a known right.” See also Paul T. Wangerin, "Plain Error” and "Fundamental Fairness": Toward a Definition of Exceptions to the Rules of Procedural Default, 29 DePaul L.Rev. 753, 757-58 (1980) (noting, in an article discussing the "raise or forfeit” rule of appellate review, that waiver suggests an "intentional relinquishment of a known right,” and contrasting forfeiture as occurring "either inadvertently or unin- , tentionally”).
. R8-18-16.
. We express no opinion as to the appropriate remedy for other situations—such as the imposition of a sentence beyond that which is authorized by statute or the imposition of a sentence not in accordance with the negotiated agreement—that would cause this court to refuse to enforce a sentence appeal waiver.
. It is conceivable that we would have allowed the defendant to replead had the government, in its initial brief, stated that it preferred to have the defendant replead instead of having the court sever the sentence appeal waiver, if the waiver was held to be invalid. In this way, the government could elect to protect its bargaining position more fully.
See, e.g., Rutan,
. The plea agreement provides that "[i]f [Bus-hert's] ... cooperation is completed prior to sentencing, the government agrees to consider whether such cooperation qualifies as ‘substantial assistance’ pursuant to 18 U.S.C. § 3553(e), Section 5K1.1 of the Sentencing Guidelines, and the policy of the United States Attorney for the Middle District of Florida, warranting the filing of a motion at the time of sentencing recommending a downward departure from the applicable guideline range.” Rl-193 at 2-3.
.Moreover, the two police officers who interviewed Bushert testified at the sentencing hearing that Bushert was untruthful in four out of the five interviews they conducted. Appellant did not offer any evidence to undermine this testimo- ' ny.
.
See United States v. Lambey,
. RlSupp-204 at 2.
. RlSupp-99 at 1.
