diff --git a/dev-python/flake8/flake8-3.8.1.ebuild b/dev-python/flake8/flake8-3.8.1.ebuild
index a78e174864156..8d00e5cc8e07c 100644
--- a/dev-python/flake8/flake8-3.8.1.ebuild
+++ b/dev-python/flake8/flake8-3.8.1.ebuild
@@ -14,7 +14,7 @@ SRC_URI="mirror://pypi/${PN:0:1}/${PN}/${P}.tar.gz"
 
 LICENSE="MIT"
 SLOT="0"
-KEYWORDS="~alpha amd64 arm arm64 hppa ~ia64 ppc ppc64 sparc x86"
+KEYWORDS="~alpha amd64 arm arm64 hppa ~ia64 ppc ppc64 ~s390 sparc x86"
 
 # requires.txt inc. mccabe however that creates a circular dep
 RDEPEND="