diff --git a/reference/posix/functions/posix-getsid.xml b/reference/posix/functions/posix-getsid.xml
index ad4a8140c1..296f2e6ec8 100644
--- a/reference/posix/functions/posix-getsid.xml
+++ b/reference/posix/functions/posix-getsid.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.6 $ -->
+<!-- $Revision: 1.7 $ -->
 <refentry xml:id="function.posix-getsid" xmlns="http://docbook.org/ns/docbook">
  <refnamediv>
   <refname>posix_getsid</refname>
@@ -52,7 +52,8 @@
     <programlisting role="php">
 <![CDATA[
 <?php
-echo posix_getsid(); //8805
+$pid = posix_getpid();
+echo posix_getsid($pid); //8805
 ?>
 ]]>
     </programlisting>