diff --git a/runtime/doc/autocmd.txt b/runtime/doc/autocmd.txt
index 0e61c2d..4de5b16 100644
--- a/runtime/doc/autocmd.txt
+++ b/runtime/doc/autocmd.txt
@@ -1,4 +1,4 @@
-*autocmd.txt*   For Vim version 7.4.  Last change: 2015 Aug 18
+*autocmd.txt*   For Vim version 7.4.  Last change: 2015 Dec 05
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -1131,6 +1131,9 @@
 :aug[roup] {name}		Define the autocmd group name for the
 				following ":autocmd" commands.  The name "end"
 				or "END" selects the default group.
+				To avoid confusion, the name should be
+				different from existing {event} names, as this
+				most likely will not do what you intended.
 
 						*:augroup-delete* *E367*
 :aug[roup]! {name}		Delete the autocmd group {name}.  Don't use