diff --git a/dev-ruby/ruby-shadow/ruby-shadow-2.5.1.ebuild b/dev-ruby/ruby-shadow/ruby-shadow-2.5.1.ebuild
index a1d3d469c90a7..2e42f05bcf5a8 100644
--- a/dev-ruby/ruby-shadow/ruby-shadow-2.5.1.ebuild
+++ b/dev-ruby/ruby-shadow/ruby-shadow-2.5.1.ebuild
@@ -3,7 +3,7 @@
 
 EAPI=8
 
-USE_RUBY="ruby31 ruby32"
+USE_RUBY="ruby31 ruby32 ruby33"
 
 RUBY_FAKEGEM_TASK_TEST=""