diff --git a/dev-python/zc-lockfile/zc-lockfile-3.0_p1.ebuild b/dev-python/zc-lockfile/zc-lockfile-3.0_p1.ebuild
index cfd0e6be81852..12d8d95ec7be0 100644
--- a/dev-python/zc-lockfile/zc-lockfile-3.0_p1.ebuild
+++ b/dev-python/zc-lockfile/zc-lockfile-3.0_p1.ebuild
@@ -18,7 +18,7 @@ HOMEPAGE="
 
 LICENSE="ZPL"
 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"
 
 BDEPEND="
 	test? (