diff --git a/dev-ruby/GeoRuby/GeoRuby-2.2.1-r2.ebuild b/dev-ruby/GeoRuby/GeoRuby-2.2.1-r2.ebuild
index 4ac9f8f596b3a..57a952ff0671b 100644
--- a/dev-ruby/GeoRuby/GeoRuby-2.2.1-r2.ebuild
+++ b/dev-ruby/GeoRuby/GeoRuby-2.2.1-r2.ebuild
@@ -5,7 +5,7 @@
 EAPI=5
 
 # uses ruby19 hash syntax
-USE_RUBY="ruby20"
+USE_RUBY="ruby20 ruby21"
 
 RUBY_FAKEGEM_RECIPE_TEST="rspec"