diff --git a/reference/soap/functions/soap-soapserver-setpersistence.xml b/reference/soap/functions/soap-soapserver-setpersistence.xml
index 9587587c9c..9bdf81fc97 100644
--- a/reference/soap/functions/soap-soapserver-setpersistence.xml
+++ b/reference/soap/functions/soap-soapserver-setpersistence.xml
@@ -1,5 +1,5 @@
 <?xml version='1.0' encoding='iso-8859-1'?>
-<!-- $Revision: 1.2 $ -->
+<!-- $Revision: 1.3 $ -->
 <refentry id="function.soap-soapserver-setpersistence">
  <refnamediv>
   <refname>SoapServer->setPersistence()</refname>
@@ -60,6 +60,14 @@ $server->setPersistence(SOAP_PERSISTENCE_REQUEST);
 ]]>
     </programlisting>
    </example>
+   <note>
+    <simpara>
+     The persistence
+     <constant>SOAP_PERSISTENCE_SESSION</constant> makes persistent only object
+     of given class, but not the class static data. You may use $this->bar
+     instead of self::$bar.
+    </simpara>
+   </note>
   </para>
  </refsect1>
  <refsect1 role="seealso">