--- linux-2.6.17.6/net/core/pktgen.c.orig	2006-07-15 15:00:43.000000000 -0400
+++ linux-2.6.17.6/net/core/pktgen.c	2006-08-07 14:50:09.000000000 -0400
@@ -2149,6 +2149,8 @@ static struct sk_buff *fill_packet_ipv4(
 	skb->mac.raw = ((u8 *) iph) - 14 - pkt_dev->nr_labels*sizeof(u32);
 	skb->dev = odev;
 	skb->pkt_type = PACKET_HOST;
+	skb->nh.iph = iph;
+	skb->h.uh = udph;
 
 	if (pkt_dev->nfrags <= 0)
 		pgh = (struct pktgen_hdr *)skb_put(skb, datalen);