Rafael Mondragon Garcia appeals from his conviction by guilty plea of distribution of methamphetamine. He contends that the district court erred by failing to adjust his offense level downward for acceptance of responsibility and pursuant to the safety-valve provision of the Sentencing Guidelines and that he received ineffective assistance of counsel at sentencing. The Government argues that Mondragon Garcia waived his right to appeal his guidelines sentencing issues.

The Government is correct. Mondragon Garcia knowingly and voluntarily waived his appeal of the guidelines sentencing issues he seeks to raise on appeal. See United States v. Robinson, 187 F.3d 516, 518 & n. 2 (5th Cir. 1999); United States v. Melancon, 972 F.2d 566, 567-68 (5th Cir. 1992). The record is insufficiently developed for this court to determine Mondragon Garcia’s contention that he received ineffective assistance of counsel; we therefore do not consider that contention. See Massaro v. United States, 538 U.S. 500, 504-05, 123 S.Ct. 1690, 155 L.Ed.2d 714 (2003).

AFFIRMED.