Trevor Henderson received a 51-month prison term following his guilty plea to one count of possession of methamphetamine with intent to distribute. He challenges the district court’s calculation of the sentencing guidelines range under U.S.S.G. § 2D1.1, asserting that the court reversibly erred by including in the drug quantity the 56.7 grams of methamphetamine he *404 promised to obtain for undercover officers but did not deliver. Inclusion of that amount increased his offense level from 12 to 26.

According to Henderson, he did not intend or have the capability to deliver the drugs but instead intended to rob the buyers of the purchase price. The district court erroneously ruled that his intent and/or capability were irrelevant once he arrived for a face-to-face meeting with the buyers. See § 2D1.1, cmt. (n.12); United States v. Davis, 478 F.3d 266, 268-70 (5th Cir. 2007). The Government fails to show that the significant procedural error was harmless. See Gall v. United States, 552 U.S. 38, 51, 128 S.Ct. 586, 169 L.Ed.2d 445 (2007); United States v. Delgado-Martinez, 564 F.3d 750, 753 (5th Cir. 2009). Accordingly, we vacate Henderson’s sentence and remand for resentencing. See Delgado-Martinez, 564 F.3d at 752-53.

Henderson also asserts that the district court reversibly erred by classifying as relevant conduct his possession of .18 grams of methamphetamine for personal use while on pre-trial release. He correctly concedes, however, that the alleged error will not affect his guidelines range. Thus, it is not a “significant procedural error.” See Gall, 552 U.S. at 51, 128 S.Ct. at 597 (defining “significant procedural error” warranting reversal to include improper calculation of the guidelines range).

SENTENCE VACATED AND REMANDED.