diff --git a/dev-python/pillow/pillow-9.1.0.ebuild b/dev-python/pillow/pillow-9.1.0.ebuild
index 4b2101d1e1b29..4ee9d207318e3 100644
--- a/dev-python/pillow/pillow-9.1.0.ebuild
+++ b/dev-python/pillow/pillow-9.1.0.ebuild
@@ -19,7 +19,7 @@ S="${WORKDIR}/${MY_P}"
 
 LICENSE="HPND"
 SLOT="0"
-KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~m68k ~ppc ~ppc64 ~riscv ~sparc ~x86 ~amd64-linux ~x86-linux"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~m68k ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86 ~amd64-linux ~x86-linux"
 IUSE="examples imagequant +jpeg jpeg2k lcms test tiff tk truetype webp xcb zlib"
 REQUIRED_USE="test? ( jpeg jpeg2k tiff truetype )"
 RESTRICT="!test? ( test )"