diff --git a/dev-ruby/matrix/matrix-0.4.3.ebuild b/dev-ruby/matrix/matrix-0.4.3.ebuild
index c2c44bf92894d..2825fc975c367 100644
--- a/dev-ruby/matrix/matrix-0.4.3.ebuild
+++ b/dev-ruby/matrix/matrix-0.4.3.ebuild
@@ -3,7 +3,7 @@
 
 EAPI=8
 
-USE_RUBY="ruby32 ruby33 ruby34"
+USE_RUBY="ruby32 ruby33 ruby34 ruby40"
 
 RUBY_FAKEGEM_EXTRADOC="CHANGELOG.md README.md"