diff --git a/manpages/shorewall.conf.xml b/manpages/shorewall.conf.xml
index e169dfa0a..0cc84920c 100644
--- a/manpages/shorewall.conf.xml
+++ b/manpages/shorewall.conf.xml
@@ -935,7 +935,8 @@ net     all  DROP   info</programlisting>then the chain name is 'net2all'
           logged packets. Please see iptables(8) for a description of the
           behavior of these parameters (the iptables option --limit is set by
           LOGRATE and --limit-burst is set by LOGBURST). If both parameters
-          are set empty, no rate-limiting will occur.</para>
+          are set empty, no rate-limiting will occur. If you supply one of
+          these, you should also supply the other.</para>
 
           <para>Example:</para>