--- src/sys/net/ethernet.h	2006/05/20 02:42:08	1.13
+++ src/sys/net/ethernet.h	2007/10/13 09:43:19	1.14
@@ -367,7 +367,7 @@ extern	int  (*ng_ether_output_p)(struct
 extern	void (*ng_ether_attach_p)(struct ifnet *ifp);
 extern	void (*ng_ether_detach_p)(struct ifnet *ifp);
 
-extern	int (*vlan_input_p)(struct ether_header *eh, struct mbuf *m);
+extern	int (*vlan_input_p)(const struct ether_header *eh, struct mbuf *m);
 extern	int (*vlan_input_tag_p)(struct mbuf *m, uint16_t t);
 
 #define VLAN_INPUT_TAG(m, t) do {			\