diff --git a/include/net.h b/include/net.h
index 3e4f304204..7692153b30 100644
--- a/include/net.h
+++ b/include/net.h
@@ -193,6 +193,30 @@ typedef struct {
 #define IPPROTO_ICMP	 1	/* Internet Control Message Protocol	*/
 #define IPPROTO_UDP	17	/* User Datagram Protocol		*/
 
+/*
+ *	Internet Protocol (IP) header.
+ */
+struct ip_hdr {
+	uchar		ip_hl_v;	/* header length and version	*/
+	uchar		ip_tos;		/* type of service		*/
+	ushort		ip_len;		/* total length			*/
+	ushort		ip_id;		/* identification		*/
+	ushort		ip_off;		/* fragment offset field	*/
+	uchar		ip_ttl;		/* time to live			*/
+	uchar		ip_p;		/* protocol			*/
+	ushort		ip_sum;		/* checksum			*/
+	IPaddr_t	ip_src;		/* Source IP address		*/
+	IPaddr_t	ip_dst;		/* Destination IP address	*/
+};
+
+#define IP_OFFS		0x1fff /* ip offset *= 8 */
+#define IP_FLAGS	0xe000 /* first 3 bits */
+#define IP_FLAGS_RES	0x8000 /* reserved */
+#define IP_FLAGS_DFRAG	0x4000 /* don't fragments */
+#define IP_FLAGS_MFRAG	0x2000 /* more fragments */
+
+#define IP_HDR_SIZE		(sizeof(struct ip_hdr))
+
 /*
  *	Internet Protocol (IP) + UDP header.
  */
@@ -213,16 +237,8 @@ struct ip_udp_hdr {
 	ushort		udp_xsum;	/* Checksum			*/
 };
 
-#define IP_OFFS		0x1fff /* ip offset *= 8 */
-#define IP_FLAGS	0xe000 /* first 3 bits */
-#define IP_FLAGS_RES	0x8000 /* reserved */
-#define IP_FLAGS_DFRAG	0x4000 /* don't fragments */
-#define IP_FLAGS_MFRAG	0x2000 /* more fragments */
-
-#define IP_HDR_SIZE_NO_UDP	(sizeof(struct ip_udp_hdr) - 8)
-
 #define IP_UDP_HDR_SIZE		(sizeof(struct ip_udp_hdr))
-#define UDP_HDR_SIZE		(IP_UDP_HDR_SIZE - IP_HDR_SIZE_NO_UDP)
+#define UDP_HDR_SIZE		(IP_UDP_HDR_SIZE - IP_HDR_SIZE)
 
 /*
  *	Address Resolution Protocol (ARP) header.
diff --git a/net/net.c b/net/net.c
index f0e8a6798f..2bf5631f0d 100644
--- a/net/net.c
+++ b/net/net.c
@@ -663,7 +663,7 @@ NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport, int len)
 static struct rpc_t rpc_specimen;
 #define IP_PKTSIZE (CONFIG_NET_MAXDEFRAG + sizeof(rpc_specimen.u.reply))
 
-#define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE_NO_UDP)
+#define IP_MAXUDP (IP_PKTSIZE - IP_HDR_SIZE)
 
 /*
  * this is the packet being assembled, either data or frag control.
@@ -688,11 +688,11 @@ static struct ip_udp_hdr *__NetDefragment(struct ip_udp_hdr *ip, int *lenp)
 	u16 ip_off = ntohs(ip->ip_off);
 
 	/* payload starts after IP header, this fragment is in there */
-	payload = (struct hole *)(pkt_buff + IP_HDR_SIZE_NO_UDP);
+	payload = (struct hole *)(pkt_buff + IP_HDR_SIZE);
 	offset8 =  (ip_off & IP_OFFS);
 	thisfrag = payload + offset8;
 	start = offset8 * 8;
-	len = ntohs(ip->ip_len) - IP_HDR_SIZE_NO_UDP;
+	len = ntohs(ip->ip_len) - IP_HDR_SIZE;
 
 	if (start + len > IP_MAXUDP) /* fragment extends too far */
 		return NULL;
@@ -705,7 +705,7 @@ static struct ip_udp_hdr *__NetDefragment(struct ip_udp_hdr *ip, int *lenp)
 		payload[0].prev_hole = 0;
 		first_hole = 0;
 		/* any IP header will work, copy the first we received */
-		memcpy(localip, ip, IP_HDR_SIZE_NO_UDP);
+		memcpy(localip, ip, IP_HDR_SIZE);
 	}
 
 	/*
@@ -788,12 +788,12 @@ static struct ip_udp_hdr *__NetDefragment(struct ip_udp_hdr *ip, int *lenp)
 	}
 
 	/* finally copy this fragment and possibly return whole packet */
-	memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE_NO_UDP, len);
+	memcpy((uchar *)thisfrag, indata + IP_HDR_SIZE, len);
 	if (!done)
 		return NULL;
 
 	localip->ip_len = htons(total_len);
-	*lenp = total_len + IP_HDR_SIZE_NO_UDP;
+	*lenp = total_len + IP_HDR_SIZE;
 	return localip;
 }
 
@@ -983,7 +983,7 @@ NetReceive(uchar *inpkt, int len)
 		if ((ip->ip_hl_v & 0x0f) > 0x05)
 			return;
 		/* Check the Checksum of the header */
-		if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2)) {
+		if (!NetCksumOk((uchar *)ip, IP_HDR_SIZE / 2)) {
 			puts("checksum bad\n");
 			return;
 		}
@@ -1273,7 +1273,7 @@ void NetSetIP(uchar *xip, IPaddr_t dest, int dport, int sport, int len)
 	ip->udp_dst  = htons(dport);
 	ip->udp_len  = htons(UDP_HDR_SIZE + len);
 	ip->udp_xsum = 0;
-	ip->ip_sum   = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
+	ip->ip_sum   = ~NetCksum((uchar *)ip, IP_HDR_SIZE / 2);
 }
 
 void copy_filename(char *dst, const char *src, int size)
diff --git a/net/ping.c b/net/ping.c
index 6a2e85dabc..8542e2299b 100644
--- a/net/ping.c
+++ b/net/ping.c
@@ -44,7 +44,7 @@ static int ping_send(void)
 	/* IP_HDR_SIZE / 4 (not including UDP) */
 	ip->ip_hl_v  = 0x45;
 	ip->ip_tos   = 0;
-	ip->ip_len   = htons(IP_HDR_SIZE_NO_UDP + 8);
+	ip->ip_len   = htons(IP_HDR_SIZE + 8);
 	ip->ip_id    = htons(NetIPID++);
 	ip->ip_off   = htons(IP_FLAGS_DFRAG);	/* Don't fragment */
 	ip->ip_ttl   = 255;
@@ -54,7 +54,7 @@ static int ping_send(void)
 	NetCopyIP((void *)&ip->ip_src, &NetOurIP);
 	/* - "" - */
 	NetCopyIP((void *)&ip->ip_dst, &NetPingIP);
-	ip->ip_sum   = ~NetCksum((uchar *)ip, IP_HDR_SIZE_NO_UDP / 2);
+	ip->ip_sum   = ~NetCksum((uchar *)ip, IP_HDR_SIZE / 2);
 
 	s = &ip->udp_src;		/* XXX ICMP starts here */
 	s[0] = htons(0x0800);		/* echo-request, code */
@@ -65,7 +65,7 @@ static int ping_send(void)
 
 	/* size of the waiting packet */
 	NetArpWaitTxPacketSize =
-		(pkt - NetArpWaitTxPacket) + IP_HDR_SIZE_NO_UDP + 8;
+		(pkt - NetArpWaitTxPacket) + IP_HDR_SIZE + 8;
 
 	/* and do the ARP request */
 	NetArpWaitTry = 1;
@@ -125,12 +125,12 @@ void ping_receive(Ethernet_t *et, struct ip_udp_hdr *ip, int len)
 		NetCopyIP((void *)&ip->ip_dst, &ip->ip_src);
 		NetCopyIP((void *)&ip->ip_src, &NetOurIP);
 		ip->ip_sum = ~NetCksum((uchar *)ip,
-				       IP_HDR_SIZE_NO_UDP >> 1);
+				       IP_HDR_SIZE >> 1);
 
 		icmph->type = ICMP_ECHO_REPLY;
 		icmph->checksum = 0;
 		icmph->checksum = ~NetCksum((uchar *)icmph,
-			(len - IP_HDR_SIZE_NO_UDP) >> 1);
+			(len - IP_HDR_SIZE) >> 1);
 		(void) eth_send((uchar *)et,
 				ETHER_HDR_SIZE + len);
 		return;