Jerald Jerome Dorsey appeals the dismissal of a 28 U.S.C. § 2241 petition challenging his 180-month sentence for being a felon in possession of a firearm. Dorsey argued that he was actually innocent of his sentence under the Armed Career Criminal Act in light of Begay v. United States, 553 U.S. 137, 128 S.Ct. 1581, 170 L.Ed.2d 490 (2008).

As a general rule, a federal prisoner who seeks to collaterally challenge the legality of his conviction or sentence must file a § 2255 motion. Padilla v. United States, 416 F.3d 424, 426-27 (5th Cir. 2005). Such claims may be raised in a § 2241 petition under the savings clause of § 2255(e) only if the prisoner shows that the § 2255 remedy is “inadequate or ineffective to test the legality of his detention.” § 2255(e).

Dorsey has not made such a showing because he has not established that his claims are based on a retroactively applicable Supreme Court decision establishing that he was convicted of a nonexistent offense. See Reyes-Requena v. United States, 243 F.3d 893, 904 (5th Cir. 2001). Moreover, a claim of actual innocence of a career offender enhancement is not a claim of actual innocence of the crime of conviction and, thus, not the type of claim that warrants review under § 2241. See Kinder v. Purdy, 222 F.3d 209, 213-14 (5th *373 Cir. 2000); see also Padilla, 416 F.3d at 426-27. Dorsey has not shown that he is entitled to proceed under § 2241 based on the savings clause of § 2255(e).

The Government’s motion for summary affirmance is GRANTED, the motion for extension of time to file a brief is DENIED, and the judgment of the district court is AFFIRMED.