Index: head/share/man/man4/ng_nat.4
===================================================================
--- head/share/man/man4/ng_nat.4
+++ head/share/man/man4/ng_nat.4
@@ -35,7 +35,7 @@
 .Sh DESCRIPTION
 An
 .Nm
-node performs network address translation (NAT) of packets
+node performs network address translation (NAT) of IPv4 packets
 passing through it.
 A
 .Nm nat
Index: head/sys/netgraph/ng_nat.c
===================================================================
--- head/sys/netgraph/ng_nat.c
+++ head/sys/netgraph/ng_nat.c
@@ -795,7 +795,6 @@
 		eh = mtod(m, struct ether_header *);
 		switch (ntohs(eh->ether_type)) {
 		case ETHERTYPE_IP:
-		case ETHERTYPE_IPV6:
 			ipofs = sizeof(struct ether_header);
 			break;
 		default: