diff --git a/dev-ruby/rexml/rexml-3.4.4.ebuild b/dev-ruby/rexml/rexml-3.4.4.ebuild
index acc425cbf91ee..b395f49db0fc0 100644
--- a/dev-ruby/rexml/rexml-3.4.4.ebuild
+++ b/dev-ruby/rexml/rexml-3.4.4.ebuild
@@ -3,7 +3,7 @@
 
 EAPI=8
 
-USE_RUBY="ruby32 ruby33 ruby34"
+USE_RUBY="ruby32 ruby33 ruby34 ruby40"
 
 RUBY_FAKEGEM_RECIPE_DOC="none"
 RUBY_FAKEGEM_EXTRADOC="NEWS.md README.md"