diff --git a/dev-python/sniffio/sniffio-1.2.0.ebuild b/dev-python/sniffio/sniffio-1.2.0.ebuild
index 13064b3ad0918..748bc48ea0baa 100644
--- a/dev-python/sniffio/sniffio-1.2.0.ebuild
+++ b/dev-python/sniffio/sniffio-1.2.0.ebuild
@@ -1,4 +1,4 @@
-# Copyright 2021 Gentoo Authors
+# Copyright 2021-2022 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=7
@@ -16,7 +16,7 @@ SRC_URI="
 
 LICENSE="|| ( Apache-2.0 MIT )"
 SLOT="0"
-KEYWORDS="amd64 arm arm64 hppa ~ia64 ppc ppc64 ~riscv sparc x86"
+KEYWORDS="amd64 arm arm64 hppa ~ia64 ppc ppc64 ~riscv ~s390 sparc x86"
 
 distutils_enable_tests pytest