diff --git a/manpages/shorewall.xml b/manpages/shorewall.xml
index 49553d98e..1ba51aadb 100644
--- a/manpages/shorewall.xml
+++ b/manpages/shorewall.xml
@@ -932,7 +932,8 @@
           can refresh chains in other tables by prefixing the chain name with
           the table name followed by ":" (e.g., nat:net_dnat). Chain names
           which follow are assumed to be in that table until the end of the
-          list or until an entry in the list names another table.</para>
+          list or until an entry in the list names another table. Built-in
+          chains such as FORWARD may not be refreshed.</para>
 
           <para>Example:<programlisting><command>shorewall refresh net2fw nat:net_dnat</command> #Refresh the 'net2loc' chain in the filter table and the 'net_dnat' chain in the nat table</programlisting></para>
         </listitem>