diff --git a/dev-python/black/black-25.12.0.ebuild b/dev-python/black/black-25.12.0.ebuild
index 734cc76be204..8fdb8ba00ff5 100644
--- a/dev-python/black/black-25.12.0.ebuild
+++ b/dev-python/black/black-25.12.0.ebuild
@@ -17,7 +17,7 @@ HOMEPAGE="
 
 LICENSE="MIT"
 SLOT="0"
-KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~loong ~ppc ~ppc64 ~riscv ~x86"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~loong ~ppc ~ppc64 ~riscv ~s390 ~x86"
 
 RDEPEND="
 	>=dev-python/click-8.0.0[${PYTHON_USEDEP}]