diff --git a/app-misc/zisofs-tools/zisofs-tools-1.0.8.ebuild b/app-misc/zisofs-tools/zisofs-tools-1.0.8.ebuild
index 288ff1329e497..f5604a4dac315 100644
--- a/app-misc/zisofs-tools/zisofs-tools-1.0.8.ebuild
+++ b/app-misc/zisofs-tools/zisofs-tools-1.0.8.ebuild
@@ -1,4 +1,4 @@
-# Copyright 1999-2020 Gentoo Authors
+# Copyright 1999-2021 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=7
@@ -10,7 +10,7 @@ SRC_URI="mirror://gentoo/${P}.tar.bz2"
 
 LICENSE="GPL-2"
 SLOT="0"
-KEYWORDS="~alpha amd64 arm arm64 ~hppa ~ia64 ~m68k ~mips ppc ppc64 ~riscv s390 sparc x86 ~amd64-linux ~x86-linux ~ppc-macos"
+KEYWORDS="~alpha amd64 arm arm64 ~hppa ~ia64 ~m68k ~mips ppc ppc64 ~riscv ~s390 sparc x86 ~amd64-linux ~x86-linux ~ppc-macos"
 IUSE="static"
 
 RDEPEND=">=sys-libs/zlib-1.1.4:0="