Mo. Rev. Stat. § 143.946: Prior conviction, effect of.

If any person convicted of an offense, or of the attempt to commit an offense under sections 143.911, 143.921, 143.931, or 143.941 is charged thereafter with having committed or having attempted to commit a subsequent offense under such sections, and is convicted, he shall be punished by imprisonment by the department of corrections and human resources for a term of not less than five nor more than ten years. If the prior conviction is appealed, then this section shall not apply until after the judgment is affirmed or the appeal is dismissed.