diff --git a/lisp/keymap.el b/lisp/keymap.el
index b2c7321a1d5..173600f4d4b 100644
--- a/lisp/keymap.el
+++ b/lisp/keymap.el
@@ -60,7 +60,11 @@ DEFINITION is anything that can be a key's definition:
     keymap has been created with a menu name, see `make-keymap'),
  or a cons (MAP . CHAR), meaning use definition of CHAR in keymap MAP,
  or an extended menu item definition.
- (See info node `(elisp)Extended Menu Items'.)"
+ (See info node `(elisp)Extended Menu Items'.)
+
+The `key-description' convenience function converts a simple
+string of characters to an equivalent form that is acceptable for
+COMMAND."
   (declare (compiler-macro (lambda (form) (keymap--compile-check key) form)))
   (keymap--check key)
   ;; If we're binding this key to another key, then parse that other