--- emacs-24.4/lisp/emacs-lisp/easy-mmode.el
+++ emacs-24.4/lisp/emacs-lisp/easy-mmode.el
@@ -114,9 +114,11 @@
 BODY contains code to execute each time the mode is enabled or disabled.
   It is executed after toggling the mode, and before running MODE-hook.
   Before the actual body code, you can write keyword arguments, i.e.
-  alternating keywords and values.  These following special keywords
-  are supported (other keywords are passed to `defcustom' if the minor
-  mode is global):
+  alternating keywords and values.  If you provide BODY, then you must
+  provide INIT-VALUE, LIGHTER, and KEYMAP, or provide at least one
+  keyword argument, or both; otherwise, BODY would be misinterpreted.
+  The following special keywords are supported (other keywords are passed
+  to `defcustom' if the minor mode is global):
 
 :group GROUP	Custom group name to use in all generated `defcustom' forms.
 		Defaults to MODE without the possible trailing \"-mode\".