diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index bbba435d0639..e71656fb5a22 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -690,6 +690,7 @@ static int ipip6_rcv(struct sk_buff *skb)
 
 		if (iptunnel_pull_header(skb, 0, htons(ETH_P_IPV6)))
 			goto out;
+		iph = ip_hdr(skb);
 
 		err = IP_ECN_decapsulate(iph, skb);
 		if (unlikely(err)) {