OPINION

Alejandro Guerrero Lopez pled guilty pursuant to a plea agreement to conspiracy to distribute and possess with intent to distribute 500 grams or more of methamphetamine. Lopez signed a written plea agreement in which he agreed to waive the right to appeal any sentence imposed except for an upward departure from the Sentencing Guidelines. A waiver-of-appeal provision in a valid plea agreement is enforceable if it results from a knowing and intelligent decision to forego an appeal. United States v. Wiggins, 905 F.2d 51, 53 (4th Cir. 1990). A waiver is ineffective if the district court fails to question the defendant about it, United States v. Wessells, 936 F.2d 165, 167-68 (4th Cir. 1991), unless other evidence in the record shows that the waiver was informed and voluntary. United States v. Davis, 954 F.2d 182, 186 (4th. Cir. 1992). We review de novo the validity of a waiver. United States v. Brown, 232 F.3d 399, 402-03 (4th Cir. 2000).

Here, Lopez signed the plea agreement, agreeing to waive the right to challenge his sentence with the stated exception. At his plea hearing, the district court reviewed the plea agreement with Lopez. In response to the court’s inquiry, Lopez agreed that he expressly waived his right to appeal his sentence. On this record, we find that Lopez’s waiver was knowingly and intelligently made.

Accordingly, we dismiss the appeal. We dispense with oral argument because the facts and legal contentions are adequately presented in the materials before the court *499 and argument would not aid the decisional process.

DISMISSED.