diff --git a/reference/pcre/pattern.syntax.xml b/reference/pcre/pattern.syntax.xml
index 0a7f11d835..81a4da7c0d 100644
--- a/reference/pcre/pattern.syntax.xml
+++ b/reference/pcre/pattern.syntax.xml
@@ -2056,13 +2056,14 @@
    more  readable  (assume  the  <link 
    linkend="reference.pcre.pattern.modifiers">PCRE_EXTENDED</link> 
    option)  and to divide it into three parts for ease of discussion:
-   
+  </para>
+  <informalexample>
    <programlisting>
 <![CDATA[
 ( \( )?    [^()]+    (?(1) \) )
 ]]>
    </programlisting>
-  </para>
+  </informalexample>
   <para>
    The first part matches an optional opening parenthesis,  and
    if  that character is present, sets it as the first captured