diff --git a/docs/configuration_file_basics.xml b/docs/configuration_file_basics.xml
index dd7ee110c..e9f7de54e 100644
--- a/docs/configuration_file_basics.xml
+++ b/docs/configuration_file_basics.xml
@@ -1552,7 +1552,7 @@ SHELL cat /etc/shorewall/rules.d/*.rules 2&gt; /dev/null || true</programlisting
     </variablelist>
   </section>
 
-  <section>
+  <section id="ShorewallVariables">
     <title>Shorewall Variables</title>
 
     <para>Shorewall Variables were introduced in Shorewall 4.5.11. To insure