diff --git a/docs/Shorewall-perl.xml b/docs/Shorewall-perl.xml
index c1c476fc4..96c3d5d62 100644
--- a/docs/Shorewall-perl.xml
+++ b/docs/Shorewall-perl.xml
@@ -542,6 +542,10 @@ loc     net      ACCEPT</programlisting>
       <listitem>
         <para>Perl FindBin Module (Shorewall 4.0.3 and later)</para>
       </listitem>
+
+      <listitem>
+        <para>Perl Scalar::Util Module (Shorewall 4.0.6 and later)</para>
+      </listitem>
     </itemizedlist>
   </section>
 
@@ -598,7 +602,7 @@ loc     net      ACCEPT</programlisting>
     expansion within the other Shorewall configuration files.</para>
   </section>
 
-  <section>
+  <section id="Modules">
     <title>The Shorewall Perl Modules</title>
 
     <para>Shorewall's Perl modules are installed in