diff --git a/dev-python/pebble/pebble-4.6.3.ebuild b/dev-python/pebble/pebble-4.6.3.ebuild
index a56e138d22ffb..21c146c258f84 100644
--- a/dev-python/pebble/pebble-4.6.3.ebuild
+++ b/dev-python/pebble/pebble-4.6.3.ebuild
@@ -17,6 +17,6 @@ S=${WORKDIR}/${P^}
 
 LICENSE="LGPL-3+"
 SLOT="0"
-KEYWORDS="~amd64 ~arm ~arm64 ~ppc ~ppc64 ~sparc ~x86"
+KEYWORDS="~amd64 ~arm ~arm64 ~ppc ~ppc64 ~s390 ~sparc ~x86"
 
 distutils_enable_tests pytest