diff --git a/dev-ruby/rack-test/rack-test-0.6.3.ebuild b/dev-ruby/rack-test/rack-test-0.6.3.ebuild
index 4fcd37484f436..3c1d30e1838b0 100644
--- a/dev-ruby/rack-test/rack-test-0.6.3.ebuild
+++ b/dev-ruby/rack-test/rack-test-0.6.3.ebuild
@@ -3,7 +3,7 @@
 # $Id$
 
 EAPI=5
-USE_RUBY="ruby20 ruby21 ruby22"
+USE_RUBY="ruby20 ruby21 ruby22 ruby23"
 
 # no documentation is generable, it needs hanna, which is broken
 RUBY_FAKEGEM_TASK_DOC=""