1 files changed, 2 insertions, 2 deletions

diff --git a/lisp/generic.el b/lisp/generic.el
index 7f2051329c9..80885915e70 100644
--- a/lisp/generic.el
+++ b/lisp/generic.el
@@ -297,8 +297,8 @@ Some generic modes are defined in `generic-x.el'."
         (when (consp start)
           (setq end (or (cdr start) end))
           (setq start (car start)))
-        (when (char-valid-p start) (setq start (char-to-string start)))
-        (when (char-valid-p end)   (setq end (char-to-string end)))
+        (when (characterp start) (setq start (char-to-string start)))
+        (when (characterp end)   (setq end (char-to-string end)))
 
         ;; Setup the vars for `comment-region'
         (if comment-start