-" --oif \tifname \t\tRoute the packet through `ifname' network interface\n"
-" --iif \tifname \t\tChange the packet's incoming interface to `ifname'\n"
-" --gw \tip \t\tRoute the packet via this gateway\n"
-" --continue\t \t\tRoute the packet and continue traversing the\n"
-" \t \t\trules. Not valid with --iif.\n"
+" --oif \tifname \t\tRoute packet through `ifname' network interface\n"
+" --iif \tifname \t\tChange packet's incoming interface to `ifname'\n"
+" --gw \tip \t\tRoute packet via this gateway `ip'\n"
+" --continue\t \t\tRoute packet and continue traversing the\n"
+" \t \t\trules. Not valid with --iif or --tee.\n"
+" --tee\t \t\tDuplicate packet, route the duplicate,\n"
+" \t \t\tcontinue traversing with original packet.\n"
+" \t \t\tNot valid with --iif or --continue.\n"