diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index 244ae0d..911d937 100644
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -178,14 +178,19 @@
 #include <net/inet_connection_sock.h>
 #include <net/inet_timewait_sock.h>
 
+static inline struct tcphdr *tcp_hdr(const struct sk_buff *skb)
+{
+	return (struct tcphdr *)skb->h.raw;
+}
+
 static inline unsigned int tcp_hdrlen(const struct sk_buff *skb)
 {
-	return skb->h.th->doff * 4;
+	return tcp_hdr(skb)->doff * 4;
 }
 
 static inline unsigned int tcp_optlen(const struct sk_buff *skb)
 {
-	return (skb->h.th->doff - 5) * 4;
+	return (tcp_hdr(skb)->doff - 5) * 4;
 }
 
 /* This defines a selective acknowledgement block. */