diff --git a/functions/filesystem.xml b/functions/filesystem.xml
index 290354bea6..da5cab78e8 100644
--- a/functions/filesystem.xml
+++ b/functions/filesystem.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.111 $ -->
+<!-- $Revision: 1.112 $ -->
  <reference id="ref.filesystem">
   <title>Filesystem functions</title>
   <titleabbrev>Filesystem</titleabbrev>
@@ -1207,7 +1207,8 @@ $fcontents = join ('', file ('http://www.php.net/'));
     <simpara>
      Note that the file pointer allows you to retrieve only the
      <emphasis>body</emphasis> of the response; you cannot
-     access the HTTP response header using this function.
+     access the HTTP response header using this function. Additionally,
+     HTTP connections are read-only.
     </simpara>
     <simpara>
      Versions prior to PHP 4.0.5 do not handle HTTP redirects. Because