diff --git a/dev-python/merge3/merge3-0.0.16.ebuild b/dev-python/merge3/merge3-0.0.16.ebuild
index f30ef8df10086..b7f039cac69cd 100644
--- a/dev-python/merge3/merge3-0.0.16.ebuild
+++ b/dev-python/merge3/merge3-0.0.16.ebuild
@@ -20,6 +20,6 @@ SRC_URI="
 
 LICENSE="GPL-2+"
 SLOT="0"
-KEYWORDS="amd64 ~arm arm64 ~loong ~ppc ~ppc64 ~riscv x86"
+KEYWORDS="amd64 ~arm arm64 ~loong ~ppc ~ppc64 ~riscv ~s390 x86"
 
 distutils_enable_tests unittest