diff --git a/reference/filesystem/functions/mkdir.xml b/reference/filesystem/functions/mkdir.xml
index c30ad9d292..b7bd4629b6 100644
--- a/reference/filesystem/functions/mkdir.xml
+++ b/reference/filesystem/functions/mkdir.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.2 $ -->
+<!-- $Revision: 1.3 $ -->
 <!-- splitted from ./en/functions/filesystem.xml, last change in rev 1.39 -->
   <refentry id="function.mkdir">
    <refnamediv>
@@ -11,7 +11,7 @@
      <methodsynopsis>
       <type>int</type><methodname>mkdir</methodname>
       <methodparam><type>string</type><parameter>pathname</parameter></methodparam>
-      <methodparam><type>int</type><parameter>mode</parameter></methodparam>
+      <methodparam>[<type>int</type><parameter>mode</parameter>]</methodparam>
      </methodsynopsis>
     <para>
      Attempts to create the directory specified by pathname.
@@ -21,6 +21,13 @@
      octal number, which means it should have a leading zero.
      The mode is also modified by the current umask, which you
      can change using <function>umask</function>.
+     
+     Mode is NOT needed on Windows.
+
+     Please note also that mode is optional and that
+     it is by default '0777' (read, write and execution for EVERY
+     access). If you need more informations about mode under 
+     UNIX systems, please read 'man 1 chmod' and 'man 2 chmod'.
      <informalexample>
       <programlisting role="php">
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