diff --git a/lisp/isearch.el b/lisp/isearch.el
index cbe72efb801..8320847893e 100644
--- a/lisp/isearch.el
+++ b/lisp/isearch.el
@@ -823,10 +823,6 @@ This is like `describe-bindings', but displays only Isearch keys."
             :image '(isearch-tool-bar-image "left-arrow")))
     map))
 
-;; Note: Before adding more key bindings to this map, please keep in
-;; mind that any unbound key exits Isearch and runs the command bound
-;; to it in the local or global map.  So in effect every key unbound
-;; in this map is implicitly bound.
 (defvar minibuffer-local-isearch-map
   (let ((map (make-sparse-keymap)))
     (set-keymap-parent map minibuffer-local-map)