diff --git a/dev-ruby/mail/mail-2.6.4.ebuild b/dev-ruby/mail/mail-2.6.4.ebuild
index 1ae66610f8264..4da754917a3e2 100644
--- a/dev-ruby/mail/mail-2.6.4.ebuild
+++ b/dev-ruby/mail/mail-2.6.4.ebuild
@@ -3,7 +3,7 @@
 # $Id$
 
 EAPI=5
-USE_RUBY="ruby20 ruby21 ruby22"
+USE_RUBY="ruby20 ruby21 ruby22 ruby23"
 
 RUBY_FAKEGEM_RECIPE_TEST="rspec"