diff --git a/language/oop5/overloading.xml b/language/oop5/overloading.xml
index 68b4fb5203..93dbc2b2b1 100644
--- a/language/oop5/overloading.xml
+++ b/language/oop5/overloading.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.18 $ -->
+<!-- $Revision: 1.19 $ -->
  <sect1 xml:id="language.oop5.overloading" xmlns="http://docbook.org/ns/docbook">
   <title>Overloading</title>
 
@@ -49,6 +49,12 @@
     value that the object should set the <varname>$name</varname>.
    </para>
 
+   <note>
+    <para>
+     The <literal>__set()</literal> method cannot take arguments by reference.
+    </para>
+   </note>
+
    <example>
     <title>overloading with __get, __set, __isset and __unset example</title>
     <programlisting role="php">