diff --git a/lisp/international/mule.el b/lisp/international/mule.el
index 0a5bc95d81c..6058527df23 100644
--- a/lisp/international/mule.el
+++ b/lisp/international/mule.el
@@ -110,7 +110,7 @@ Return t if file exists."
 	      (< (aref vector 0) 160)))))
 
 (defsubst charsetp (object)
-  "T is OBJECT is a charset."
+  "T if OBJECT is a charset."
   (and (symbolp object) (vectorp (get object 'charset))))
 
 (defsubst charset-info (charset)