diff --git a/manpages/shorewall-tunnels.xml b/manpages/shorewall-tunnels.xml
index e92469c35..792c93003 100644
--- a/manpages/shorewall-tunnels.xml
+++ b/manpages/shorewall-tunnels.xml
@@ -55,7 +55,8 @@
         <listitem>
           <para>Types are as follows:</para>
 
-          <programlisting>        <emphasis role="bold">ipsec</emphasis>         - IPv4 IPSEC
+          <programlisting>        <emphasis role="bold">6to4</emphasis>          - 6to4 or 6in4 tunnel         
+        <emphasis role="bold">ipsec</emphasis>         - IPv4 IPSEC
         <emphasis role="bold">ipsecnat</emphasis>      - IPv4 IPSEC with NAT Traversal (UDP port 4500 encapsulation)
         <emphasis role="bold">ipip</emphasis>          - IPv4 encapsulated in IPv4 (Protocol 4)
         <emphasis role="bold">gre</emphasis>           - Generalized Routing Encapsulation (Protocol 47)