diff --git a/dev-python/commonmark/commonmark-0.9.1.ebuild b/dev-python/commonmark/commonmark-0.9.1.ebuild
index aa5d8fe00cc45..5d1a7e796737b 100644
--- a/dev-python/commonmark/commonmark-0.9.1.ebuild
+++ b/dev-python/commonmark/commonmark-0.9.1.ebuild
@@ -14,7 +14,7 @@ SRC_URI="mirror://pypi/${PN:0:1}/${PN}/${P}.tar.gz"
 
 LICENSE="BSD"
 SLOT="0"
-KEYWORDS="~alpha amd64 arm arm64 hppa ~ia64 ~m68k ppc ppc64 ~riscv sparc x86 ~amd64-linux ~x86-linux"
+KEYWORDS="~alpha amd64 arm arm64 hppa ~ia64 ~m68k ppc ppc64 ~riscv ~s390 sparc x86 ~amd64-linux ~x86-linux"
 IUSE="test"
 RESTRICT="!test? ( test )"