diff --git a/reference/session/ini.xml b/reference/session/ini.xml
index edb77216a5..af0f6d5a2d 100644
--- a/reference/session/ini.xml
+++ b/reference/session/ini.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.45 $ -->
+<!-- $Revision: 1.46 $ -->
 <section id="session.configuration">
  &reftitle.runtime;
  &extension.runtime;
@@ -627,7 +627,7 @@
   <varlistentry id="ini.session.hash-function">
    <term>
     <parameter>session.hash_function</parameter>
-    <type>integer</type>
+    <type>mixed</type>
    </term>
    <listitem>
     <simpara>
@@ -635,6 +635,13 @@
      algorithm used to generate the session IDs. '0' means MD5 (128 bits) and
      '1' means SHA-1 (160 bits).
     </simpara>
+    <para>
+     Since PHP 6.0.0 it is also possible to specify any of the algorithms
+     provided by the <link linkend="ref.hash">hash extension</link> (if it is
+     available), like <literal>sha512</literal> or
+     <literal>whirlpool</literal>. A complete list of supported algorithms can
+     be obtained with the <function>hash_algos</function> function.
+    </para>
     <note>
      <para>
       This was introduced in PHP 5.