diff --git a/dev-python/cheroot/cheroot-10.0.1.ebuild b/dev-python/cheroot/cheroot-10.0.1.ebuild
index 8cf41ad8d48c4..42908750152c1 100644
--- a/dev-python/cheroot/cheroot-10.0.1.ebuild
+++ b/dev-python/cheroot/cheroot-10.0.1.ebuild
@@ -17,7 +17,7 @@ HOMEPAGE="
 
 LICENSE="BSD"
 SLOT="0"
-KEYWORDS="~alpha amd64 arm arm64 ~hppa ~loong ~m68k ppc ppc64 ~riscv ~sparc x86"
+KEYWORDS="~alpha amd64 arm arm64 ~hppa ~loong ~m68k ppc ppc64 ~riscv ~s390 ~sparc x86"
 IUSE="test-rust"
 
 RDEPEND="