diff --git a/language/predefined/arrayaccess/offsetset.xml b/language/predefined/arrayaccess/offsetset.xml
index 7d35fabcad..4ead791072 100644
--- a/language/predefined/arrayaccess/offsetset.xml
+++ b/language/predefined/arrayaccess/offsetset.xml
@@ -51,6 +51,25 @@
   </para>
  </refsect1>
 
+ <refsect1 role="notes">
+  &reftitle.notes;
+  <note>
+   <para>
+    The <parameter>offset</parameter> parameter will be set to &null; if
+    another value is not available, like in the following example.
+    <informalexample>
+     <programlisting role="php">
+<![CDATA[
+<?php
+$arrayoffset[] = "value";
+?>
+]]>
+     </programlisting>
+    </informalexample>
+   </para>
+  </note>
+ </refsect1>
+
 <!--
  <refsect1 role="examples">
   &reftitle.examples;