diff --git a/sys-fs/mdadm/mdadm-4.6.ebuild b/sys-fs/mdadm/mdadm-4.6.ebuild
index 012e2436867d2..a325c4cc7f960 100644
--- a/sys-fs/mdadm/mdadm-4.6.ebuild
+++ b/sys-fs/mdadm/mdadm-4.6.ebuild
@@ -14,7 +14,7 @@ SRC_URI+=" mirror://debian/pool/main/m/mdadm/${PN}_${DEB_PF}.debian.tar.xz"
 LICENSE="GPL-2"
 SLOT="0"
 if [[ ${PV} != *_rc* ]] ; then
-	KEYWORDS="~alpha amd64 arm arm64 ~hppa ~loong ppc ppc64 ~riscv ~sparc x86"
+	KEYWORDS="~alpha amd64 arm arm64 ~hppa ~loong ppc ppc64 ~riscv ~s390 ~sparc x86"
 fi
 IUSE="static systemd +udev corosync"
 REQUIRED_USE="static? ( !udev )"