Hardesty appeals from the denial of his motion to reduce his sentence pursuant to 28 U.S.C. § 2255 and former Federal Rule of Criminal Procedure 35(a). He was convicted in federal district court for possession of a sawed-off shotgun in violation of 26 U.S.C. §§ 5861(d), 5871 and sentenced to ten years’ imprisonment. The district court ordered that Hardesty’s sentence run consecutively to a state prison sentence that he was serving at the time of his federal conviction.

Hardesty filed a motion to correct the sentence. He argued before the district court that the consecutive sentence was illegal under this court’s decision in United States v. Terrovona, 785 F.2d 767, 769 (9th Cir.1986) (Terrovona), and United States v. Williams, 651 F.2d 644, 647 n. 2 (9th Cir.1981) (Williams).

The government opposed the motion relying on this court’s earlier decision in United States v. Thornton, 710 F.2d 513 (9th Cir.1983) {Thornton). The district court, after observing that the Terrovona opinion did not cite Thornton, denied the motion. The district court concluded that it was bound by Thornton on the ground that “when two panels reach different conclusions the earlier decision controls, unless the [circuit] court decides the question en banc, or a United States Supreme Court opinion reverses the earlier panel.” Unit[*1348] ed States v. Hardesty, No. CR-83-0134-OMP (D.Or. filed June 27, 1990) (citing United States v. Magana, 797 F.2d 777, 779 (9th Cir.1986); United States v. Maybusher, 735 F.2d 366, 371 n. 1 (9th Cir.1984)).

A majority of a three-judge panel of this court affirmed the denial of the motion to correct the sentence holding that it was free to apply Thornton, without calling for en bane review, notwithstanding that “Thornton and Terrovona are clearly in conflict.” United States v. Hardesty, 958 F.2d 910, 912 (9th Cir.1992) (Hardesty). In determining that it had the authority to proceed without an en banc call, the majority relied on Greenhow v. Secretary of Health & Human Services, 863 F.2d 633 (9th Cir.1988).

In his suggestion for rehearing en banc, Hardesty asserted that under the law of this circuit, the irreconcilable conflict between Thornton and Terrovona must be resolved by an en banc court. In Atonio v. Wards Cove Packing Co., 810 F.2d 1477 (9th Cir.1987) (en banc), cert. denied, 485 U.S. 989, 108 S.Ct. 1293, 99 L.Ed.2d 503 (1988), we held that “the appropriate mechanism for resolving an irreconcilable conflict is an en banc decision.” Id. at 1478-79. Unless an alternative method is provided by rule of this court, “[a] panel faced with such a conflict must call for en banc review, which the court will normally grant unless the prior decisions can be distinguished.” Id. at 1479 (emphasis added). In Greenhow, a three-judge panel of this court held that where there are two opposing lines of authority, a panel may, without calling for en banc review, follow the rule which has “successfully posed as the law of the circuit for long enough to be relied upon.” 863 F.2d at 636. Greenhow did not cite our Atonio en banc decision. We therefore overrule Greenhow to the extent that it conflicts with Atonio.

Hardesty argues that the consecutive sentence was illegal and requests that his sentence be reduced for time served or, in the alternative, that probation be substituted for the federal sentence. The district court had jurisdiction pursuant to 18 U.S.C. § 3231. We have jurisdiction over this timely appeal pursuant to 28 U.S.C. § 1291. We affirm.

Hardesty argues that the district court improperly ordered his federal sentence to run consecutively to his previously imposed state sentence. Because Hardesty contends that his sentence is illegal as a matter of law, our review is de novo. United States v. Wills, 881 F.2d 823, 825 (9th Cir.1989).

Hardesty points out that in Terrovona we held that until November 1, 1987, a district court lacked the authority to order that a sentence be served either consecutively or concurrently. 785 F.2d at 770. Hardesty was sentenced in 1984. The government contends that consecutive sentences are lawful according to Thornton. In Thornton, we held that former 18 U.S.C. § 3568 did not limit the authority of judges to order that sentences be served consecutively. 710 F.2d at 516; see also United States v. O’Brien, 789 F.2d 1344, 1346 (9th Cir.1986) (O’Brien) (following Thornton).

We granted rehearing en banc to resolve the conflict between Thornton and Terrovona. Our prior cases and authority from other circuits counsel in favor of adopting the rule in Thornton. Consecutive sentencing was permitted by the law of this circuit as early as 1941. See Gunton v. Squier, 185 F.2d 470, 471 (9th Cir.1950) (approving consecutive sentence); Hayden v. Warden, 124 F.2d 514, 514-15 (9th Cir.1941) (same). In Gunton, we stated that

[i]t is a well recognized rule of law that a person who has violated the criminal statutes of both the Federal and State Government may not complain of the order in which he is tried or punished for such offenses. Each is a sentence unto itself, otherwise there would be no orderly procedure in handling cases of this kind between two sovereigns.

185 F.2d at 471. Since our restatement of this rule in Thornton, no appellate court has approved the Terrovona analysis. See, e.g., O’Brien, 789 F.2d at 1346. In addi[*1349]tion, eight of our sister circuits agree that federal district courts have the power to impose a sentence that commences after completion of an existing state sentence. See Harding v. United States, 851 F.2d 1305, 1306 (11th Cir.1988); Pinaud v. James, 851 F.2d 27, 30 (2d Cir.1988); United States v. Campisi, 622 F.2d 697, 699 (3d Cir.1980); Causey v. Civiletti, 621 F.2d 691, 694 (5th Cir.1980); Cox v. United States ex rel. Arron, 551 F.2d 1096, 1098 (7th Cir.1977); United States v. Lee, 500 F.2d 586, 587-88 (8th Cir.), cert. denied, 419 U.S. 1003, 95 S.Ct. 322, 42 L.Ed.2d 279 (1974); Anderson v. United States, 405 F.2d 492, 493 (10th Cir.), cert. denied, 394 U.S. 965, 89 S.Ct. 1318, 22 L.Ed.2d 567 (1969); Jervis v. United States, 382 F.2d 592, 593 (1st Cir.1967).

Terrovona, on the other hand, stands alone in failing to recognize the rule enunciated in Thornton as the law of the circuit. Terrovona relied on three cases addressing the question whether a district court could order concurrent sentences under former 18 U.S.C. § 3568. See Terrovona, 785 F.2d at 770; Williams, 651 F.2d 644; United States v. Segal, 549 F.2d 1293 (9th Cir.), cert. denied, 431 U.S. 919, 97 S.Ct. 2187, 53 L.Ed.2d 231 (1977); United States v. Myers, 451 F.2d 402 (9th Cir.1972). Of these cases, only Williams discussed the question of the district court’s power to impose consecutive sentences, and then only in dicta. Williams, 651 F.2d at 647 n. 2.

We conclude that the better rule is stated by Thornton and our sister circuits. In our en banc capacity, we reaffirm Thornton and overrule Terrovona to the extent that it is inconsistent with Thornton. The district court did not err in ordering Har-desty’s sentence to run consecutively to his undischarged state sentence.

Hardesty also argues that the district court abused its discretion in refusing to order an updated presentence report. We do not review this issue en banc and leave the panel opinion’s disposition of the question intact. Hardesty, 958 F.2d at 915-16.

AFFIRMED.