--- src/sys/net/if_ethersubr.c	2007/10/13 08:49:35	1.46
+++ src/sys/net/if_ethersubr.c	2007/10/13 09:43:19	1.47
@@ -113,7 +113,7 @@ int	(*ng_ether_output_p)(struct ifnet *i
 void	(*ng_ether_attach_p)(struct ifnet *ifp);
 void	(*ng_ether_detach_p)(struct ifnet *ifp);
 
-int	(*vlan_input_p)(struct ether_header *eh, struct mbuf *m);
+int	(*vlan_input_p)(const struct ether_header *eh, struct mbuf *m);
 int	(*vlan_input_tag_p)(struct mbuf *m, uint16_t t);
 
 static int ether_output(struct ifnet *, struct mbuf *, struct sockaddr *,