diff --git a/reference/network/functions/header.xml b/reference/network/functions/header.xml
index 3dbb180655..ba7e1c165d 100644
--- a/reference/network/functions/header.xml
+++ b/reference/network/functions/header.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.6 $ -->
+<!-- $Revision: 1.7 $ -->
 <refentry xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://docbook.org/ns/docbook" xml:id="function.header">
  <refnamediv>
   <refname>header</refname>
@@ -215,7 +215,7 @@ readfile('original.pdf');
 <![CDATA[
 <?php
 header("Cache-Control: no-cache, must-revalidate"); // HTTP/1.1
-header("Expires: Mon, 26 Jul 1997 05:00:00 GMT"); // Date in the past
+header("Expires: Sat, 26 Jul 1997 05:00:00 GMT"); // Date in the past
 ?>
 ]]>
     </programlisting>