diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c
index 843cc09..b7f6ff4 100644
--- a/net/ipv4/ipip.c
+++ b/net/ipv4/ipip.c
@@ -461,9 +461,10 @@
 #endif
 }
 
-static inline void ipip_ecn_decapsulate(struct iphdr *outer_iph, struct sk_buff *skb)
+static inline void ipip_ecn_decapsulate(const struct iphdr *outer_iph,
+					struct sk_buff *skb)
 {
-	struct iphdr *inner_iph = skb->nh.iph;
+	struct iphdr *inner_iph = ip_hdr(skb);
 
 	if (INET_ECN_is_ce(outer_iph->tos))
 		IP_ECN_set_ce(inner_iph);
@@ -471,10 +472,8 @@
 
 static int ipip_rcv(struct sk_buff *skb)
 {
-	struct iphdr *iph;
 	struct ip_tunnel *tunnel;
-
-	iph = skb->nh.iph;
+	const struct iphdr *iph = ip_hdr(skb);
 
 	read_lock(&ipip_lock);
 	if ((tunnel = ipip_tunnel_lookup(iph->saddr, iph->daddr)) != NULL) {
@@ -521,7 +520,7 @@
 	__be16 df = tiph->frag_off;
 	struct rtable *rt;     			/* Route to the other host */
 	struct net_device *tdev;			/* Device to other host */
-	struct iphdr  *old_iph = skb->nh.iph;
+	struct iphdr  *old_iph = ip_hdr(skb);
 	struct iphdr  *iph;			/* Our new IP header */
 	int    max_headroom;			/* The extra header space needed */
 	__be32 dst = tiph->daddr;
@@ -615,7 +614,7 @@
 			skb_set_owner_w(new_skb, skb->sk);
 		dev_kfree_skb(skb);
 		skb = new_skb;
-		old_iph = skb->nh.iph;
+		old_iph = ip_hdr(skb);
 	}
 
 	skb->h.raw = skb->nh.raw;
@@ -631,7 +630,7 @@
 	 *	Push down and install the IPIP header.
 	 */
 
-	iph 			=	skb->nh.iph;
+	iph 			=	ip_hdr(skb);
 	iph->version		=	4;
 	iph->ihl		=	sizeof(struct iphdr)>>2;
 	iph->frag_off		=	df;