Ind. Code § 29-1-6-2
If, in any will admitted to probate in any of the courts of this state, there is a provision or provisions providing that if any beneficiary thereunder shall take any proceeding to contest such will or to prevent the admission thereof to probate, or provisions to that effect, such beneficiary shall thereby forfeit any benefit which said will made for said beneficiary, such provision or provisions shall be void and of no force or effect.
Formerly: Acts 1953, c.112, s.602.