--- ipt_ipp2p.c.orig	2007-07-10 05:17:34.000000000 +1100
+++ ipt_ipp2p.c	2007-07-10 05:21:48.000000000 +1100
@@ -748,7 +748,11 @@
 {
     const struct ipt_p2p_info *info = matchinfo;
     unsigned char  *haystack;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)
+    struct iphdr *ip = ip_hdr(skb);
+#else
     struct iphdr *ip = skb->nh.iph;
+#endif
     int p2p_result = 0, i = 0;
 //    int head_len;
     int hlen = ntohs(ip->tot_len)-(ip->ihl*4);	/*hlen = packet-data length*/