diff --git a/reference/apd/functions/apd-set-pprof-trace.xml b/reference/apd/functions/apd-set-pprof-trace.xml
new file mode 100644
index 0000000000..51ea301947
--- /dev/null
+++ b/reference/apd/functions/apd-set-pprof-trace.xml
@@ -0,0 +1,53 @@
+<?xml version="1.0" encoding="iso-8859-1"?>
+<!-- $Revision: 1.1 $ -->
+  <refentry id="function.apd-set-pprof-trace">
+   <refnamediv>
+    <refname>apd_set_pprof_trace</refname>
+    <refpurpose>Starts the session debugging</refpurpose>
+   </refnamediv>
+   <refsect1>
+    <title>Description</title>
+     <methodsynopsis>
+      <type>void</type><methodname>apd_set_pprof_trace</methodname>
+      <methodparam choice="opt"><type>string</type><parameter>dump_directory</parameter></methodparam>
+     </methodsynopsis>
+    <para>
+     Starts debugging to {dump_directory}/apd_dump_{process_id}, if 
+     dump_directory is not set, then the apd.dumpdir setting from the 
+     &php.ini; file is used.
+    </para>
+    <para>
+     <example>
+      <title><function>apd_set_pprof_trace</function> example</title>
+      <programlisting role="php">
+<![CDATA[
+<?php
+apd_set_pprof_trace();
+?>
+]]>
+      </programlisting>
+     </example>
+    </para> 
+   </refsect1>
+  </refentry>
+
+<!-- Keep this comment at the end of the file
+Local variables:
+mode: sgml
+sgml-omittag:t
+sgml-shorttag:t
+sgml-minimize-attributes:nil
+sgml-always-quote-attributes:t
+sgml-indent-step:1
+sgml-indent-data:t
+indent-tabs-mode:nil
+sgml-parent-document:nil
+sgml-default-dtd-file:"../../../../manual.ced"
+sgml-exposed-tags:nil
+sgml-local-catalogs:nil
+sgml-local-ecat-files:nil
+End:
+vim600: syn=xml fen fdm=syntax fdl=2 si
+vim: et tw=78 syn=sgml
+vi: ts=1 sw=1
+-->
diff --git a/reference/apd/reference.xml b/reference/apd/reference.xml
index 630400d062..5aeb68c231 100644
--- a/reference/apd/reference.xml
+++ b/reference/apd/reference.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.2 $ -->
+<!-- $Revision: 1.3 $ -->
  <reference id="ref.apd">
   <title>Advanced PHP debugger</title>
   <titleabbrev>APD</titleabbrev>
@@ -34,7 +34,7 @@
      <para>
       <programlisting role="php">
 <![CDATA[
-apd_set_session_trace(9);
+apd_set_pprof_trace();
 ]]>
       </programlisting>
      </para>
@@ -62,8 +62,8 @@ APD - Advanced PHP Debugger Trace File
 Process Pid (31994)
 Trace Begun at Fri Aug 10 16:37:45 2001
 ---------------------------------------------------------------------------
-(  0.000000): apd_set_session_trace called at somewhere
-(  0.001482): apd_set_session_trace() returned.  Elapsed (997475865.364909)
+(  0.000000): apd_set_pprof_trace called at somewhere
+(  0.001482): apd_set_pprof_trace() returned.  Elapsed (997475865.364909)
 (  0.001563): getcwd() /opt/apache/htdocs/a.php:4
 (  0.001628): getcwd() returned.  Elapsed (0.000065)
 (  0.001819): require() /opt/apache/htdocs/a.php:6