diff --git a/docs/configuration_file_basics.xml b/docs/configuration_file_basics.xml
index 8b922eee5..c132ad02b 100644
--- a/docs/configuration_file_basics.xml
+++ b/docs/configuration_file_basics.xml
@@ -1438,7 +1438,9 @@ SHELL cat /etc/shorewall/rules.d/*.rules 2&gt; /dev/null || true</programlisting
     richer and more flexible extension capability.</para>
 
     <para>While inline scripts may be written in either Shell or Perl, those
-    written in Perl have a lot more power.</para>
+    written in Perl have a lot more power. They may be used in all
+    configuration files except <filename>/etc/shorewall/params</filename> and
+    <filename>/etc/shorewall/shorewall.conf</filename>.</para>
 
     <para>Embedded scripts can be either single-line or multi-line. Single
     line scripts take one of the following forms:</para>