Olasunkanmi Shittu pleaded guilty to several crimes including bank fraud, mail fraud, and aggravated identity theft. He was sentenced to a total 84 months in prison, including consecutive sentences for aggravated .identity theft. On appeal, he says that his plea was invalid because the district court failed to advise him that the sentences for aggravated identity theft could run consecutively to each other.

Shittu’s claim is reviewed for plain error because he did not raise it in the district court. See United States v. Davila, — U.S. -, 133 S.Ct. 2139, 2147, 186 L.Ed.2d 139 (2013); United States v. Vonn, 535 U.S. 55, 62-63, 122 S.Ct. 1043, 152 L.Ed.2d 90 (2002). Shittu must show that a forfeited error was “clear or obvious, rather than subject to reasonable dispute,” and that the error affected his substantial rights. Puckett v. United States, 556 U.S. 129, 135, 129 S.Ct. 1423, 173 L.Ed.2d 266 (2009). If he does so, we have the discretion to correct the error if it seriously affects the integrity, fairness, or public reputation of the court proceedings. Id.

*416 Shittu points to no authority directly supporting his contention that the court was required to advise him that those sentences could run consecutively to each other. Rather, 18 U.S.C. § 3584(a) provides that sentences may be imposed to run concurrently or consecutively, and “the effect of 18 U.S.C. § 3584 is not a consequence of which a defendant must be advised before a guilty plea may be accepted.” United States v. Hernandez, 234 F.3d 252, 256 (5th Cir. 2000). The district court, at least, did not commit an error that was “clear or obvious” beyond “reasonable dispute.” Puckett, 556 U.S. at 135, 129 S.Ct. 1423.

Moreover, Shittu pleaded guilty after being advised that he faced up to 30 years in prison, and he was sentenced below that. “[T]he instance of a defendant being sentenced to less than what he was informed was his maximum penalty is ‘a prototypical case of harmless error.’ ” United States v. Williams, 120 F.3d 575, 578 (5th Cir. 1997) (quoting United States v. Pierce, 5 F.3d 791, 793 (5th Cir. 1993)). Shittu’s bare assertion does not establish that, but for an error, he would not have pleaded guilty. See Dominguez Benitez, 542 U.S. at 83, 124 S.Ct. 2333.

The judgment is AFFIRMED.