diff --git a/lisp/ses.el b/lisp/ses.el
index 8b270842734..b02f2c4c103 100644
--- a/lisp/ses.el
+++ b/lisp/ses.el
@@ -203,10 +203,7 @@ Used for listing local printers or renamed cells.")
 		[C-S-mouse-3] ses-insert-ses-range-click
                 "\C-h\C-p"    ses-list-local-printers
                 "\C-h\C-n"    ses-list-named-cells
-		"\M-\C-i"     lisp-complete-symbol)) ; redefined
-                                                     ; dynamically in
-                                                     ; editing
-                                                     ; functions
+                "\M-\C-i"     completion-at-point))
 	(newmap (make-sparse-keymap)))
     (set-keymap-parent newmap minibuffer-local-map)
     (while keys