diff --git a/dev-ruby/childprocess/childprocess-0.5.3.ebuild b/dev-ruby/childprocess/childprocess-0.5.3.ebuild
index 8de42c06a432e..b7d3c2ded731b 100644
--- a/dev-ruby/childprocess/childprocess-0.5.3.ebuild
+++ b/dev-ruby/childprocess/childprocess-0.5.3.ebuild
@@ -3,7 +3,7 @@
 # $Id$
 
 EAPI=5
-USE_RUBY="ruby20"
+USE_RUBY="ruby20 ruby21"
 
 RUBY_FAKEGEM_RECIPE_TEST="rspec"