diff --git a/reference/pdo/constants.xml b/reference/pdo/constants.xml
index 81529b77ee..0dc6a7fcd3 100644
--- a/reference/pdo/constants.xml
+++ b/reference/pdo/constants.xml
@@ -1,5 +1,5 @@
 <?xml version='1.0' encoding='iso-8859-1'?>
-<!-- $Revision: 1.23 $ -->
+<!-- $Revision: 1.24 $ -->
 <!-- Generated by xml_proto.php v2.1. Found in /scripts directory of phpdoc. -->
 <appendix xml:id="pdo.constants" xmlns="http://docbook.org/ns/docbook">
  &reftitle.constants;
@@ -207,6 +207,13 @@
      Specifies that the fetch method shall return a new instance of the
      requested class, mapping the columns to named properties in the class.
     </simpara>
+    <note>
+     <simpara>
+      The magic
+      <link linkend="language.oop5.overloading.members"><methodname>__set</methodname></link>
+      method is called if the property doesn't exist in the requested class
+     </simpara>
+    </note>
    </listitem>
   </varlistentry>
   <varlistentry>