diff --git a/language/control-structures.xml b/language/control-structures.xml
index fe28074132..7b538d4d5b 100644
--- a/language/control-structures.xml
+++ b/language/control-structures.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.167 $ -->
+<!-- $Revision: 1.168 $ -->
  <chapter xml:id="language.control-structures" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
   <title>Control Structures</title>
 
@@ -532,7 +532,7 @@ endfor;
    </simpara>
    <para>
     <informalexample>
-     <programlisting>
+     <programlisting role="php">
 <![CDATA[
 <?php
 /*
@@ -562,7 +562,7 @@ for($i = 0; $i < sizeof($people); ++$i)
    </simpara>
    <para>
     <informalexample>
-     <programlisting>
+     <programlisting role="php">
 <![CDATA[
 <?php
 $people = Array(