Carlos Enriquez Hernandez appeals the district court’s order denying his motion to modify his term of imprisonment.* We have reviewed the record and find no reversible error. As the district court held, Amendment 640 to the Sentencing Guidelines is a substantive amendment, which cannot be retroactively applied absent express authorization in U.S.S.G. § 1B1.10(c). See U.S. Sentencing Guidelines Manual § 1B1.10(a) (2002); United States v. Hernandez, No. CR-95-262 (M.D.N.C. Oct. 28, 2003). Amendment 640 is not listed in § 1B1.10(c). Accordingly, we affirm the judgment of the district court. We dispense with oral argument because the facts and legal contentions are adequately presented in the materials before the court and argument would not aid the decisional process.

AFFIRMED