diff --git a/dev-ruby/diff-lcs/diff-lcs-1.6.2.ebuild b/dev-ruby/diff-lcs/diff-lcs-1.6.2.ebuild
index 2d0d02b40061..00fa0d55e995 100644
--- a/dev-ruby/diff-lcs/diff-lcs-1.6.2.ebuild
+++ b/dev-ruby/diff-lcs/diff-lcs-1.6.2.ebuild
@@ -1,8 +1,8 @@
-# Copyright 1999-2025 Gentoo Authors
+# Copyright 1999-2026 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=8
-USE_RUBY="ruby32 ruby33 ruby34"
+USE_RUBY="ruby32 ruby33 ruby34 ruby40"
 
 RUBY_FAKEGEM_RECIPE_TEST="rspec3"