diff --git a/reference/datetime/datetime/construct.xml b/reference/datetime/datetime/construct.xml
index ca30f09226..867773a31b 100644
--- a/reference/datetime/datetime/construct.xml
+++ b/reference/datetime/datetime/construct.xml
@@ -75,8 +75,10 @@ echo $datetime->format(DATE_ATOM);
     </para>
     <programlisting role="php">
 <![CDATA[
+<?php
 $timestamp = $_SERVER["REQUEST_TIME"];
 $dt = new DateTime("@$timestamp");
+?>
 ]]>
     </programlisting>
    </example>