diff --git a/lisp/international/robin.el b/lisp/international/robin.el
index ab8c0e2230a..e4a9dab5589 100644
--- a/lisp/international/robin.el
+++ b/lisp/international/robin.el
@@ -5,7 +5,7 @@
 ;;   Registration Number: H15PRO110
 
 ;; Author: TAKAHASHI Naoto <ntakahas@m17n.org>
-;; Keywords: mule, multilingual, input method
+;; Keywords: mule, multilingual, input method, i18n
 
 ;; This file is part of GNU Emacs.