Benson Watta Wanambisi, federal prisoner # 04013-265, appeals the dismissal of his 28 U.S.C. § 2241 habeas petition challenging his conviction and sentence for conspiracy to import heroin into the United States. Wanambisi contends that his sentence is unconstitutional in light of United States v. Booker, 543 U.S. 220, 125 S.Ct. 738, 160 L.Ed.2d 621 (2005).

Because Wanambisi challenges errors that occurred at sentencing, the claim may not be asserted in a § 2241 petition. See Padilla v. United States, 416 F.3d 424, 426-27 (5th Cir. 2005). Insofar as he has suggested that he is entitled to proceed under § 2241 based on the “savings clause” of 28 U.S.C. § 2255, because relief under the latter section is “inadequate or ineffective,” such suggestion is unavailing. Id. at 427. The district court’s judgment is AFFIRMED. Wanambisi’s motion to supplement the record is DENIED.