diff --git a/dev-ruby/unf_ext/unf_ext-0.0.9.1.ebuild b/dev-ruby/unf_ext/unf_ext-0.0.9.1.ebuild
index 93ee53a957d24..1731bc8730ff5 100644
--- a/dev-ruby/unf_ext/unf_ext-0.0.9.1.ebuild
+++ b/dev-ruby/unf_ext/unf_ext-0.0.9.1.ebuild
@@ -3,7 +3,7 @@
 
 EAPI=8
 
-USE_RUBY="ruby31 ruby32"
+USE_RUBY="ruby31 ruby32 ruby33"
 
 RUBY_FAKEGEM_RECIPE_TEST="none"