diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index 2592850..4cf0d33 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -1,4 +1,4 @@
-*options.txt*	For Vim version 7.0aa.  Last change: 2006 Feb 02
+*options.txt*	For Vim version 7.0aa.  Last change: 2006 Feb 10
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -1621,13 +1621,16 @@
 'completeopt' 'cot'	string	(default: "menu")
 			global
 			{not in Vi}
-	Options for Insert mode completion |ins-completion|.
-	Currently the only supported value is:
+	A comma separated list of options for Insert mode completion
+	|ins-completion|.  The supported values are:
 
 	   menu	    Use a popup menu to show the possible completions.  The
 		    menu is only shown when there is more than one match and
 		    sufficient colors are available.  |ins-completion-menu|
 
+	   longest  Only insert the longest common text of the matches.  Use
+	            CTRL-L to add more characters.
+
 
 				*'confirm'* *'cf'* *'noconfirm'* *'nocf'*
 'confirm' 'cf'		boolean (default off)