Defendant William J. Johnson appeals his sentence following his guilty plea to one count of being a felon in possession of a firearm in violation of 18 U.S.C. § 922(g). On appeal defendant alleges the following: (1) the government violated its plea agreement with defendant by alerting the probation officer preparing the presentence report to the sentence enhancement for three prior violent felonies as provided in 18 U.S.C. § 924(e)(1), filing an information noting the applicability of § 924(e)(1), and producing exhibits verifying the convictions; (2) the district court could not impose a sentence above the maximum sentence contained in the plea petition; (3) the government violated defendant’s constitutional rights by not informing him of the enhancement before he agreed to the plea; and (4) the evidence was insufficient to support the three prior violent felonies required for enhancement under § 924(e)(1).
I
Initially defendant was charged not only with violation of § 922(g) but also of 18 U.S.C. § 922(a)(6), for making a false statement in acquisition of a firearm. Defendant agreed to plead guilty to the § 922(g) count for the government’s agreement to drop the § 922(a)(6) count and not to recommend ' a departure from the sentencing guidelines range. The plea agreement provided:
In return for [defendant’s] plea of guilty to Count I of the Indictment, Count II will be dismissed with prejudice, and the government agrees not to recommend a departure from the normal range in the Sentencing Guidelines issued by the United States Sentencing Commission under the Sentencing Reform Act.
I R. tab 13 at 4.
At the time of the negotiations and the court’s acceptance of the guilty plea apparently both defense counsel and the government were unaware that § 924(e)(1) was applicable to defendant. The plea petition represented that the maximum sentence applicable to defendant would be ten years, but made clear that “a U.S. Probation Officer will be assigned to conduct a thorough presentence investigation to develop all relevant facts concerning [defendant’s] case” and “[i]n determining the sentence to im *859 pose, [defendant] understand^] that the Court may take into account all relevant criminal conduct and background characteristics unless otherwise prohibited by law.” I R. tab 13 at 4. The petition also stated that defendant’s sentence was “solely a matter within the control of the Judge.” Id. Before accepting the plea, the district court specifically warned defendant that depending upon the nature of his crime and criminal conduct his sentence might be enhanced significantly. See III R. at 18 (specifically referencing what appears to be 18 U.S.C. § 924(c)(1)). The court ordered a presentence investigation “to develop all relevant facts concerning [defendant’s] criminal conduct,” III R. at 17, 21, to enable proper sentencing.
After reviewing the presentence report, the government recognized that the three prior violent felonies set out in the report triggered § 924(e)(l)’s penalty enhancement and brought the statute to the probation officer’s attention. The government filed an information that notified defendant that the enhancement applied and requested that the court inform defendant of the higher maximum sentence and allow him to withdraw his guilty plea. The district court did so inform defendant, setting a trial date for a month later to give defendant time to consider his options. Defendant chose to stand by his guilty plea and to argue that the enhancement violated the plea agreement and should not apply. The district court found that the government did not violate the plea agreement, but ruled that even if it did, allowing withdrawal of the guilty plea was the proper remedy because the court could not ignore the mandatory enhancement without imposing a sentence in violation of law. It sentenced defendant to the statutory minimum fifteen year sentence, which he has now appealed. We have jurisdiction under 18 U.S.C. § 3742(a).
Questions of law regarding interpretation of § 924(e) are subject to de novo review.
United States v. Tisdale,
II
A
First we hold that the government did not violate its plea agreement with defendant. The agreement as stated in the written form and as explained by counsel before the district court is unambiguous: in exchange for defendant’s guilty plea on count one, the government agreed to dismiss count two and not to recommend departure from the normal sentencing guidelines range. The government dismissed count two and did not recommend a departure from the guideline range. Defendant’s sentence is not a departure from the guideline range.
Significantly, § 924(e)(1) is a penalty enhancement, not a separate substantive crime.
E.g., United States v. Gregg,
B
Defendant alleges that even if the government technically did not violate the language of the agreement, it violated what defendant reasonably believed was the agreement. “[T]he plea agreement should be construed according to what [defendant] reasonably understood when he entered his plea.”
Jimenez,
The government was authorized to notify the sentencing judge and the probation officer of errors in the presentence report.
See Jimenez,
Ill
Once the sentencing court was aware that the requirements of § 924(e)(1) were satisfied, the enhancement was mandatory. The statute does not require government action to trigger its application nor does it vest discretion in the sentencing court not to apply its mandate. Section 924(e)(1) states that a defendant meeting the requirements of the subsection
“shall
be ... imprisoned not less than fifteen years.” (emphasis added).
1
See Black’s Law Dictionary
1375 (6th ed. 1990) (shall, as used in statutes, is given a compulsory meaning). The sentencing court may invoke the enhancement sua sponte without a request by the government.
United States v. Towne,
United States v. Jackson,
The district court acted properly in allowing defendant to withdraw his guilty plea because the plea petition inaccurately indicated a ten year maximum sentence and initially was made under a false assumption.
See United States v. McCann,
Misinformation regarding the maximum sentence which causes a defendant to believe that the penalty is less than the actual possible sentence serves as a basis for withdrawal of a guilty plea. Thus, [defendant] should be given the opportunity to plead anew with correct information regarding the maximum possible punishment.
Should [defendant] persist in his original desire to plead guilty, we see no legal barrier to sentencing [him] to a more severe sentence.
Id. at 658.
Defendant’s affirmation of the guilty plea following the court’s disclosure that the enhancement and the statutory minimum of fifteen years would apply was voluntary. The district court, even after accepting the guilty plea but before sentencing, appropriately could correct an error of law in the plea petition; it was not required to adhere to an incorrect statutory maximum sentence.
See United States v. Richardson,
IV
We also reject defendant’s argument that the government’s failure to notify him of its intention to pursue the enhancement before the plea agreement violated defendant’s due process and equal protection rights. There is no evidence that the government intentionally misled defendant, as it apparently did not know that the enhancement would apply until the presentence report reflected the required three prior violent felonies. Defendant, on the other hand, certainly knew about the three prior violent felony convictions and reasonably might be held to expect they would affect his sentence. The enhancement is not a new or additional charge brought by the government following the plea bargain,
see, e.g., Ruo,
V
Finally, we consider whether there was sufficient evidence to establish the three prior felonies under § 924(e). The district court must find the three prior felony convictions were established by a preponderance of the evidence.
See, e.g., United States v. Wilkinson,
Although the penalty in this case may seem harsh, the federal courts must enforce the mandates enacted by Congress.
AFFIRMED.
Notes
. Section 924(e)(1) states:
In the case of a person who violates section 922(g) of this title and has three previous convictions by any court referred to in section 922(g)(1) of this title for a violent felony or a serious drug offense, or both, committed on occasions different from one another, such person shall be fined not more than $25,000 and imprisoned not less than fifteen years, and, notwithstanding any other provision of law, the court shall not suspend the sentence of, or grant a probationary sentence to, such person with respect to the conviction under section 922(g), and such person shall not be eligible for parole with respect to the sentence imposed under this subsection.
