diff --git a/dev-ruby/rdtool/rdtool-0.6.38-r2.ebuild b/dev-ruby/rdtool/rdtool-0.6.38-r2.ebuild
index 4e0132c75591b..e2d02511db5ae 100644
--- a/dev-ruby/rdtool/rdtool-0.6.38-r2.ebuild
+++ b/dev-ruby/rdtool/rdtool-0.6.38-r2.ebuild
@@ -3,7 +3,7 @@
 # $Id$
 
 EAPI=5
-USE_RUBY="ruby20 ruby21 ruby22"
+USE_RUBY="ruby20 ruby21 ruby22 ruby23"
 
 RUBY_FAKEGEM_TASK_DOC="doc"
 RUBY_FAKEGEM_EXTRADOC="HISTORY README.*"