diff --git a/LDP/howto/docbook/Firewall-Piercing.sgml b/LDP/howto/docbook/Firewall-Piercing.sgml
index f76a486b..632671fe 100644
--- a/LDP/howto/docbook/Firewall-Piercing.sgml
+++ b/LDP/howto/docbook/Firewall-Piercing.sgml
@@ -856,7 +856,7 @@ route add -host 11.22.33.44 gw 12.34.56.1
 </programlisting>
 You must also keep the route to the client's local network,
 necessary for linux kernel 2.0 and earlier,
-but but unnecessary for linux kernel 2.2 and later
+but unnecessary for linux kernel 2.2 and later
 (that implicitly adds it during the <command>ifconfig</command>):
 <programlisting>
 route add -net 12.34.56.0 netmask 255.255.255.0 dev eth0