diff --git a/reference/session/reference.xml b/reference/session/reference.xml
index 47d18404c8..2748232535 100644
--- a/reference/session/reference.xml
+++ b/reference/session/reference.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.6 $ -->
+<!-- $Revision: 1.7 $ -->
  <reference id="ref.session">
   <title>Session handling functions</title>
   <titleabbrev>Sessions</titleabbrev>
@@ -234,6 +234,12 @@ else {
     send the appropriate cookie.  <literal>SID</literal> is either of
     the form <literal>session_name=session_id</literal> or is an empty
     string.
+    <note>
+     <para>
+     The <link linkend="ini.arg_separator.output">arg_separator.output</link>
+     &php.ini; directive allows to customize the argument seperator.
+     </para>
+    </note> 
    </para>
    <para>
     The following example demonstrates how to register a variable, and