diff --git a/reference/array/functions/array-diff-assoc.xml b/reference/array/functions/array-diff-assoc.xml
index 000e4b1c51..58941ebc64 100644
--- a/reference/array/functions/array-diff-assoc.xml
+++ b/reference/array/functions/array-diff-assoc.xml
@@ -149,6 +149,23 @@ Array
     <literal>array_diff_assoc($array1[0], $array2[0]);</literal>.
    </simpara>
   </note>
+  <note>
+   <simpara>
+    Ensure you pass arguments in the correct order when comparing similar 
+    arrays with more keys. The new array should be the first in the list, 
+    for example,
+    <programlisting role="php">
+<![CDATA[
+<?php
+$array1 = array('a' => 'blue', 'b' => 'green', 'c' => 'yellow');
+$array2 = array('a' => 'blue', 'b' => 'green');
+$result = array_diff_assoc($array1, $array2);
+print_r($result);
+?>
+]]>
+    </programlisting>
+   </simpara>
+  </note>
  </refsect1>
 
  <refsect1 role="seealso">