diff --git a/lisp/electric.el b/lisp/electric.el
index 9610b4be22f..ed968d7c65e 100644
--- a/lisp/electric.el
+++ b/lisp/electric.el
@@ -198,8 +198,8 @@ relative order must be maintained within it."
   (setq-default post-self-insert-hook
                 (sort (default-value 'post-self-insert-hook)
                       #'(lambda (fn1 fn2)
-                          (< (or (if (symbol fn1) (get fn1 'priority)) 0)
-                             (or (if (symbol fn2) (get fn2 'priority)) 0))))))
+                          (< (or (if (symbolp fn1) (get fn1 'priority)) 0)
+                             (or (if (symbolp fn2) (get fn2 'priority)) 0))))))
 
 ;;; Electric indentation.