diff --git a/dev-ruby/contracts/contracts-0.16.0.ebuild b/dev-ruby/contracts/contracts-0.16.0.ebuild
index b813886a3a4b9..7182654c0aea1 100644
--- a/dev-ruby/contracts/contracts-0.16.0.ebuild
+++ b/dev-ruby/contracts/contracts-0.16.0.ebuild
@@ -16,5 +16,5 @@ HOMEPAGE="https://github.com/egonSchiele/contracts.ruby"
 
 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"
 IUSE=""