diff --git a/reference/image/functions/imagegd2.xml b/reference/image/functions/imagegd2.xml
index 7a3b2ab84e..f76add08bd 100644
--- a/reference/image/functions/imagegd2.xml
+++ b/reference/image/functions/imagegd2.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.3 $ -->
+<!-- $Revision: 1.4 $ -->
 <!-- splitted from ./en/functions/image.xml, last change in rev 1.67 -->
   <refentry id='function.imagegd2'>
    <refnamediv>
@@ -12,10 +12,23 @@
       <type>int</type><methodname>imagegd2</methodname>
       <methodparam><type>resource</type><parameter>image</parameter></methodparam>
       <methodparam choice="opt"><type>string</type><parameter>filename</parameter></methodparam>
+      <methodparam choice="opt"><type>int</type><parameter>chunk_size</parameter></methodparam>
+      <methodparam choice="opt"><type>string</type><parameter>type</parameter></methodparam>
      </methodsynopsis>
     <para>
      &warn.undocumented.func;
     </para>
+    <para>
+     The optional <parameter>type</parameter> parameter is either 
+     <literal>raw</literal> or <literal>compressed</literal>.
+    </para>
+    <note>
+     <para>
+      The optional <parameter>chunk_size</parameter> and
+      <parameter>type</parameter> parameters became available
+      in PHP 4.3.1.
+     </para>
+    </note>
    </refsect1>
   </refentry>