diff --git a/dev-python/picobox/picobox-2.2.0.ebuild b/dev-python/picobox/picobox-2.2.0.ebuild
index dd91e06d810d1..f8cd695118abb 100644
--- a/dev-python/picobox/picobox-2.2.0.ebuild
+++ b/dev-python/picobox/picobox-2.2.0.ebuild
@@ -14,7 +14,7 @@ SRC_URI="mirror://pypi/${PN:0:1}/${PN}/${P}.tar.gz"
 
 LICENSE="MIT"
 SLOT="0"
-KEYWORDS="~amd64 ~arm ~arm64 ~hppa ~ia64 ~ppc ~ppc64 ~sparc ~x86"
+KEYWORDS="~amd64 ~arm ~arm64 ~hppa ~ia64 ~ppc ~ppc64 ~s390 ~sparc ~x86"
 
 BDEPEND="
 	dev-python/setuptools_scm[${PYTHON_USEDEP}]