diff --git a/lisp/abbrev.el b/lisp/abbrev.el
index c0380058b53..234b8230587 100644
--- a/lisp/abbrev.el
+++ b/lisp/abbrev.el
@@ -58,7 +58,7 @@ Interactively, use the command `abbrev-mode'
 to enable or disable Abbrev mode in the current buffer."
   :type 'boolean
   :group 'abbrev-mode)
-;;;###autoload(put 'abbrev-mode 'safe-local-variable 'symbolp)
+;;;###autoload(put 'abbrev-mode 'safe-local-variable 'booleanp)
 
 
 (defvar edit-abbrevs-map