diff --git a/dev-ruby/power_assert/power_assert-3.0.1.ebuild b/dev-ruby/power_assert/power_assert-3.0.1.ebuild
index 40c990080cacf..ee94c009e0346 100644
--- a/dev-ruby/power_assert/power_assert-3.0.1.ebuild
+++ b/dev-ruby/power_assert/power_assert-3.0.1.ebuild
@@ -3,7 +3,7 @@
 
 EAPI=8
 
-USE_RUBY="ruby32 ruby33 ruby34"
+USE_RUBY="ruby32 ruby33 ruby34 ruby40"
 
 RUBY_FAKEGEM_EXTRADOC="README.md"