diff --git a/dev-libs/isa-l/isa-l-2.31.1.ebuild b/dev-libs/isa-l/isa-l-2.31.1.ebuild
index 5a98a6ce620c7..afec9c09e051a 100644
--- a/dev-libs/isa-l/isa-l-2.31.1.ebuild
+++ b/dev-libs/isa-l/isa-l-2.31.1.ebuild
@@ -11,7 +11,7 @@ SRC_URI="https://github.com/intel/${PN}/archive/refs/tags/v${PV}.tar.gz -> ${P}.
 
 LICENSE="BSD"
 SLOT="0"
-KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~riscv ~sparc ~x86"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~riscv ~s390 ~sparc ~x86"
 
 BDEPEND="
 	amd64? ( || (