diff --git a/dev-db/mariadb/mariadb-10.6.21.ebuild b/dev-db/mariadb/mariadb-10.6.21.ebuild
index 786a213a1f316..23869316a4c11 100644
--- a/dev-db/mariadb/mariadb-10.6.21.ebuild
+++ b/dev-db/mariadb/mariadb-10.6.21.ebuild
@@ -22,7 +22,7 @@ S="${WORKDIR}/mysql"
 
 LICENSE="GPL-2 LGPL-2.1+"
 SLOT="$(ver_cut 1-2)/${SUBSLOT:-0}"
-KEYWORDS="~amd64 ~arm ~arm64 ~hppa ~loong ~ppc ~ppc64 ~riscv ~x86"
+KEYWORDS="~amd64 ~arm ~arm64 ~hppa ~loong ~ppc ~ppc64 ~riscv ~s390 ~x86"
 IUSE="+backup bindist columnstore cracklib debug extraengine galera innodb-lz4
 	innodb-lzo innodb-snappy jdbc jemalloc kerberos latin1 mroonga
 	numa odbc oqgraph pam +perl profiling rocksdb selinux +server sphinx