diff --git a/dev-ruby/brass/brass-1.2.1-r1.ebuild b/dev-ruby/brass/brass-1.2.1-r1.ebuild
index 37b2bd656156e..6650cda480fd4 100644
--- a/dev-ruby/brass/brass-1.2.1-r1.ebuild
+++ b/dev-ruby/brass/brass-1.2.1-r1.ebuild
@@ -3,7 +3,7 @@
 
 EAPI=8
 
-USE_RUBY="ruby32 ruby33 ruby34"
+USE_RUBY="ruby32 ruby33 ruby34 ruby40"
 
 RUBY_FAKEGEM_TASK_TEST="" # it's a tiny stub test
 RUBY_FAKEGEM_EXTRADOC="README.md"