diff --git a/dev-libs/libcbor/libcbor-0.7.0.ebuild b/dev-libs/libcbor/libcbor-0.7.0.ebuild
index d0c568fb3be0f..9d906f79cbf15 100644
--- a/dev-libs/libcbor/libcbor-0.7.0.ebuild
+++ b/dev-libs/libcbor/libcbor-0.7.0.ebuild
@@ -12,7 +12,7 @@ SRC_URI="https://github.com/PJK/${PN}/archive/v${PV}.tar.gz -> ${P}.tar.gz"
 
 LICENSE="MIT"
 SLOT="0/${PV}"
-KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~ia64 ~ppc ~ppc64 ~sparc ~x86"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~ia64 ~ppc ~ppc64 ~s390 ~sparc ~x86"
 IUSE="+custom-alloc doc test"
 
 BDEPEND="