diff --git a/dev-ruby/coolio/coolio-1.5.1.ebuild b/dev-ruby/coolio/coolio-1.5.1.ebuild
index 1f7043353420b..f5e6db466c6e8 100644
--- a/dev-ruby/coolio/coolio-1.5.1.ebuild
+++ b/dev-ruby/coolio/coolio-1.5.1.ebuild
@@ -3,7 +3,7 @@
 
 EAPI=6
 
-USE_RUBY="ruby21 ruby22 ruby23"
+USE_RUBY="ruby21 ruby22 ruby23 ruby24"
 
 RUBY_FAKEGEM_RECIPE_TEST="rspec3"
 RUBY_FAKEGEM_EXTRADOC="CHANGES.md README.md"