In his habeas petition 1 and briefs in this court appellant contends that (1) after the issuance of a parole violator’s warrant, he was denied a prompt revocation hearing as required by Morrissey v. Brewer, 408 U.S. 471, 92 S.Ct. 2593, 33 L.Ed.2d 484 (1974), and (2) the failure promptly to dispose of the parole violator’s charge requires that the federal detainer be lifted. Appellant was in custody on state charges at the time of issuance of the federal warrant and detainer. Hence, this case is controlled by Cook v. United States Attorney General, 488 F.2d. 667 (5th Cir.), cert. denied, 419 U.S. 846, 95 S.Ct. 8, 42 L.Ed.2d 75 (1974), in which we held that a revocation hearing *573 was not required, at the commencement of the state imprisonment, oh an issued but unexecuted parole violator’s warrant. 2 Accordingly, appellant’s contentions are without merit. The district court’s judgment denying the petition is AFFIRMED.