Verlie Lee Henderson, Texas prisoner # 199786, appeals the dismissal of his civil rights complaint pursuant to 28 U.S.C. § 1915A. In that complaint, Henderson challenged the constitutionality of Texas’ parole procedures. Henderson’s brief, however, does not address the district court’s determinations that (1) Fifth Circuit precedent deemed his ex post facto *793 claim frivolous and (2) his due process challenge was not cognizable in a 42 U.S.C. § 1983 proceeding. These issues are therefore waived. See Brinkmann v. Dallas County Deputy Sheriff Abner, 813 F.2d 744, 748 (5th Cir. 1987).

Henderson’s appeal is frivolous and is therefore dismissed. See Howard v. King, 707 F.2d 215, 220 (5th Cir. 1983); 5th Cir. R. 42.2. We remind Henderson that, after the docketing of the instant appeal, we imposed the 28 U.S.C. § 1915(g) bar in Henderson v. Enns, 179 Fed.Appx. 225 (5th Cir. 2006) (unpublished). Consequently, Henderson is barred from proceeding in forma pauperis in any civil action or appeal filed while he is incarcerated or detained in any facility unless he is under imminent danger of serious physical injury. § 1915(g).

APPEAL DISMISSED.