diff --git a/dev-ruby/webrick/webrick-1.9.2.ebuild b/dev-ruby/webrick/webrick-1.9.2.ebuild
index 1aed1ac325ea2..f5be1d04a9333 100644
--- a/dev-ruby/webrick/webrick-1.9.2.ebuild
+++ b/dev-ruby/webrick/webrick-1.9.2.ebuild
@@ -3,7 +3,7 @@
 
 EAPI=8
 
-USE_RUBY="ruby32 ruby33 ruby34"
+USE_RUBY="ruby32 ruby33 ruby34 ruby40"
 
 RUBY_FAKEGEM_BINWRAP=""
 RUBY_FAKEGEM_EXTRADOC="README.md"