diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index 8cf2aa7..a5e6fff 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -1,4 +1,4 @@
-*options.txt*	For Vim version 7.4.  Last change: 2016 Jan 09
+*options.txt*	For Vim version 7.4.  Last change: 2016 Jan 19
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -4489,6 +4489,8 @@
 	'*', '"' and '|' (so that CTRL-] on a command finds the help for that
 	command).
 	When the 'lisp' option is on the '-' character is always included.
+	This option also influences syntax highlighting, unless the syntax
+	uses |:syn-iskeyword|.
 	NOTE: This option is set to the Vi default value when 'compatible' is
 	set and to the Vim default value when 'compatible' is reset.