diff --git a/dev-ruby/appraisal/appraisal-2.5.0.ebuild b/dev-ruby/appraisal/appraisal-2.5.0.ebuild
index 11aec22dc3d2f..9804c5c7dec1e 100644
--- a/dev-ruby/appraisal/appraisal-2.5.0.ebuild
+++ b/dev-ruby/appraisal/appraisal-2.5.0.ebuild
@@ -14,7 +14,7 @@ HOMEPAGE="https://github.com/thoughtbot/appraisal"
 
 LICENSE="MIT"
 SLOT="$(ver_cut 1)"
-KEYWORDS="~amd64 ~riscv"
+KEYWORDS="~amd64 ~riscv ~s390"
 IUSE=""
 
 ruby_add_rdepend "