diff --git a/include/net.h b/include/net.h
index 69dceb1..eeea466 100644
--- a/include/net.h
+++ b/include/net.h
@@ -254,8 +254,7 @@ struct ip_udp_hdr {
 /*
  *	Address Resolution Protocol (ARP) header.
  */
-typedef struct
-{
+struct arp_hdr {
 	ushort		ar_hrd;		/* Format of hardware address	*/
 #   define ARP_ETHER	    1		/* Ethernet  hardware address	*/
 	ushort		ar_pro;		/* Format of protocol address	*/
@@ -280,7 +279,7 @@ typedef struct
 	uchar		ar_tha[];	/* Target hardware address	*/
 	uchar		ar_tpa[];	/* Target protocol address	*/
 #endif /* 0 */
-} ARP_t;
+};
 
 #define ARP_HDR_SIZE	(8+20)		/* Size assuming ethernet	*/
 
diff --git a/net/arp.c b/net/arp.c
index c3def63..5b16de7 100644
--- a/net/arp.c
+++ b/net/arp.c
@@ -51,7 +51,7 @@ void ArpInit(void)
 void ArpRequest(void)
 {
 	uchar *pkt;
-	ARP_t *arp;
+	struct arp_hdr *arp;
 
 	debug("ARP broadcast %d\n", NetArpWaitTry);
 
@@ -59,7 +59,7 @@ void ArpRequest(void)
 
 	pkt += NetSetEther(pkt, NetBcastAddr, PROT_ARP);
 
-	arp = (ARP_t *) pkt;
+	arp = (struct arp_hdr *) pkt;
 
 	arp->ar_hrd = htons(ARP_ETHER);
 	arp->ar_pro = htons(PROT_IP);
@@ -115,7 +115,7 @@ void ArpTimeoutCheck(void)
 
 void ArpReceive(struct ethernet_hdr *et, struct ip_udp_hdr *ip, int len)
 {
-	ARP_t *arp;
+	struct arp_hdr *arp;
 	IPaddr_t tmp;
 	uchar *pkt;
 
@@ -130,7 +130,7 @@ void ArpReceive(struct ethernet_hdr *et, struct ip_udp_hdr *ip, int len)
 	 */
 	debug("Got ARP\n");
 
-	arp = (ARP_t *)ip;
+	arp = (struct arp_hdr *)ip;
 	if (len < ARP_HDR_SIZE) {
 		printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
 		return;
diff --git a/net/rarp.c b/net/rarp.c
index bd073c3..da50961 100644
--- a/net/rarp.c
+++ b/net/rarp.c
@@ -43,10 +43,10 @@ int RarpTry;
  */
 void rarp_receive(struct ip_udp_hdr *ip, unsigned len)
 {
-	ARP_t *arp;
+	struct arp_hdr *arp;
 
 	debug("Got RARP\n");
-	arp = (ARP_t *)ip;
+	arp = (struct arp_hdr *)ip;
 	if (len < ARP_HDR_SIZE) {
 		printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
 		return;
@@ -87,14 +87,14 @@ static void RarpTimeout(void)
 void RarpRequest(void)
 {
 	uchar *pkt;
-	ARP_t *rarp;
+	struct arp_hdr *rarp;
 
 	printf("RARP broadcast %d\n", ++RarpTry);
 	pkt = NetTxPacket;
 
 	pkt += NetSetEther(pkt, NetBcastAddr, PROT_RARP);
 
-	rarp = (ARP_t *)pkt;
+	rarp = (struct arp_hdr *)pkt;
 
 	rarp->ar_hrd = htons(ARP_ETHER);
 	rarp->ar_pro = htons(PROT_IP);