Terrence Millsaps, federal prisoner # 83445-012, appeals from the district court’s denial of his motion for reduction of sentence pursuant to 18 U.S.C. § 3582(c)(2). We review the district court’s denial for an abuse of discretion. See United States v. Boe, 117 F.3d 830, 831 (5th Cir. 1997); United States v. Shaw, 30 F.3d 26, 28-29 (5th Cir. 1994).

Millsaps’s motion relies upon a sentencing guideline amendment that was enacted more than two years before his sentence was imposed. Millsaps’s contention that he did not receive notice of his sentencing enhancement pursuant to 21 U.S.C. § 851 is not cognizable under § 3582(c)(2). Accordingly, the district court did not abuse its discretion in denying Millsaps’s motion. See Shaw, 30 F.3d at 28.

Millsaps’s appeal is dismissed as frivolous. See 5th Cir. R. 42.2; Howard v. King, 707 F.2d 215, 219-20 (5th Cir. 1983). We caution Millsaps that further frivolous filings may result in the imposition of sanctions, including dismissal, monetary penalties, and restrictions on his ability to file appeals in this court and actions in any court subject to this court’s jurisdiction.

*991 APPEAL DISMISSED; SANCTION WARNING ISSUED.