diff --git a/dev-ruby/sexp_processor/sexp_processor-4.17.5.ebuild b/dev-ruby/sexp_processor/sexp_processor-4.17.5.ebuild
index 92671780d0b9f..a2c886792e013 100644
--- a/dev-ruby/sexp_processor/sexp_processor-4.17.5.ebuild
+++ b/dev-ruby/sexp_processor/sexp_processor-4.17.5.ebuild
@@ -1,9 +1,9 @@
-# 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_DOCDIR="doc"
 RUBY_FAKEGEM_EXTRADOC="README.rdoc History.rdoc"