Index: sys/net/if_ethersubr.c
===================================================================
--- sys/net/if_ethersubr.c
+++ sys/net/if_ethersubr.c
@@ -916,7 +916,8 @@
 	sdl->sdl_alen = ifp->if_addrlen;
 	bcopy(lla, LLADDR(sdl), ifp->if_addrlen);
 
-	bcopy(lla, ifp->if_hw_addr, ifp->if_addrlen);
+	if (ifp->if_hw_addr != NULL)
+		bcopy(lla, ifp->if_hw_addr, ifp->if_addrlen);
 
 	bpfattach(ifp, DLT_EN10MB, ETHER_HDR_LEN);
 	if (ng_ether_attach_p != NULL)