diff --git a/dev-python/socketpool/socketpool-0.5.3-r3.ebuild b/dev-python/socketpool/socketpool-0.5.3-r3.ebuild
index d0a6bb2b2a4b4..2239527fc95f2 100644
--- a/dev-python/socketpool/socketpool-0.5.3-r3.ebuild
+++ b/dev-python/socketpool/socketpool-0.5.3-r3.ebuild
@@ -11,7 +11,7 @@ DESCRIPTION="A simple Python socket pool"
 HOMEPAGE="https://github.com/benoitc/socketpool/"
 SRC_URI="mirror://pypi/${PN:0:1}/${PN}/${P}.tar.gz"
 
-KEYWORDS="~alpha amd64 arm arm64 ~hppa ~ia64 ppc ppc64 ~sparc x86"
+KEYWORDS="~alpha amd64 arm arm64 ~hppa ~ia64 ppc ppc64 ~s390 ~sparc x86"
 IUSE="eventlet examples gevent"
 LICENSE="|| ( MIT public-domain )"
 SLOT="0"