diff --git a/extensions/compat_skbuff.h b/extensions/compat_skbuff.h
index 97aa971..b46976d 100644
--- a/extensions/compat_skbuff.h
+++ b/extensions/compat_skbuff.h
@@ -1,6 +1,9 @@
 #ifndef COMPAT_SKBUFF_H
 #define COMPAT_SKBUFF_H 1
 
+struct tcphdr;
+struct udphdr;
+
 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 19)
 #	define skb_nfmark(skb) (((struct sk_buff *)(skb))->nfmark)
 #else
@@ -12,10 +15,19 @@
 #	define ip_hdrlen(skb) (ip_hdr(skb)->ihl * 4)
 #	define ipv6_hdr(skb) ((skb)->nh.ipv6h)
 #	define skb_network_header(skb) ((skb)->nh.raw)
+#	define skb_transport_header(skb) ((skb)->h.raw)
 static inline void skb_reset_network_header(struct sk_buff *skb)
 {
 	skb->nh.raw = skb->data;
 }
+static inline struct tcphdr *tcp_hdr(const struct sk_buff *skb)
+{
+	return (void *)skb_transport_header(skb);
+}
+static inline struct udphdr *udp_hdr(const struct sk_buff *skb)
+{
+	return (void *)skb_transport_header(skb);
+}
 #endif
 
 #endif /* COMPAT_SKBUFF_H */