diff --git a/dev-ruby/expression_parser/expression_parser-0.9.0_p20130518.ebuild b/dev-ruby/expression_parser/expression_parser-0.9.0_p20130518.ebuild
index 3c645f3b6d1a9..7078cb9441f55 100644
--- a/dev-ruby/expression_parser/expression_parser-0.9.0_p20130518.ebuild
+++ b/dev-ruby/expression_parser/expression_parser-0.9.0_p20130518.ebuild
@@ -3,7 +3,7 @@
 # $Id$
 
 EAPI=5
-USE_RUBY="ruby20 ruby21 ruby22"
+USE_RUBY="ruby20 ruby21 ruby22 ruby23"
 
 RUBY_FAKEGEM_RECIPE_TEST="rspec"
 RUBY_FAKEGEM_RECIPE_DOC="rdoc"