diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index f535fcf..ea247e2 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 Jul 09
+*options.txt*	For Vim version 7.4.  Last change: 2016 Jul 12
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -6455,6 +6455,8 @@
 	The |FilterReadPre|, |FilterReadPost| and |FilterWritePre|,
 	|FilterWritePost| autocommands event are not triggered when
 	'shelltemp' is off.
+	The `system()` function does not respect this option and always uses
+	temp files.
 
 						*'shelltype'* *'st'*
 'shelltype' 'st'	number	(default 0)