diff --git a/include/net.h b/include/net.h
index 68f5fea..5a6b808 100644
--- a/include/net.h
+++ b/include/net.h
@@ -314,6 +314,7 @@
 extern int		NetRxPktLen;		/* Current rx packet length	*/
 extern unsigned		NetIPID;		/* IP ID (counting)		*/
 extern uchar		NetBcastAddr[6];	/* Ethernet boardcast address	*/
+extern uchar		NetEtherNullAddr[6];
 
 #define VLAN_NONE	4095			/* untagged 			*/
 #define VLAN_IDMASK	0x0fff			/* mask of valid vlan id 	*/
@@ -334,7 +335,7 @@
 extern int		NetRestartWrap;		/* Tried all network devices	*/
 #endif
 
-typedef enum { BOOTP, RARP, ARP, TFTP, DHCP, PING, DNS, NFS, CDP } proto_t;
+typedef enum { BOOTP, RARP, ARP, TFTP, DHCP, PING, DNS, NFS, CDP, NETCONS } proto_t;
 
 /* from net/net.c */
 extern char	BootFile[128];			/* Boot File name		*/