diff --git a/dev-ruby/imagesize/imagesize-0.1.1_p20100902-r1.ebuild b/dev-ruby/imagesize/imagesize-0.1.1_p20100902-r1.ebuild
index 7d888e1e49aac..012bf86f48de1 100644
--- a/dev-ruby/imagesize/imagesize-0.1.1_p20100902-r1.ebuild
+++ b/dev-ruby/imagesize/imagesize-0.1.1_p20100902-r1.ebuild
@@ -3,7 +3,7 @@
 # $Id$
 
 EAPI=5
-USE_RUBY="ruby20 ruby21 ruby22"
+USE_RUBY="ruby20 ruby21 ruby22 ruby23"
 
 RUBY_FAKEGEM_TASK_DOC=""
 RUBY_FAKEGEM_EXTRADOC="README.txt"