diff --git a/reference/mysql/functions/mysql-affected-rows.xml b/reference/mysql/functions/mysql-affected-rows.xml
index cbc6a0d4ea..7cf08d39af 100644
--- a/reference/mysql/functions/mysql-affected-rows.xml
+++ b/reference/mysql/functions/mysql-affected-rows.xml
@@ -131,6 +131,14 @@ Updated Records: 10
     use <function>mysql_num_rows</function>.
    </para>
   </note>
+  <note>
+   <title>Cascaded Foreign Keys</title>
+   <para>
+     <function>mysql_affected_rows</function> does not count rows affected
+     implicitly through the use of ON DELETE CASCADE and/or ON UPDATE CASCADE 
+     in foreign key constraints.
+   </para>
+  </note>
  </refsect1>
 
  <refsect1 role="seealso">