diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c
index 322b082ede1ecaa58545ea34017d4873e9524c96..6a06e15694dc4e266a6b09d01965e24a6457c519 100644
--- a/net/ipv4/ip_input.c
+++ b/net/ipv4/ip_input.c
@@ -400,7 +400,7 @@ int ip_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt,
 
 	iph = skb->nh.iph;
 
-	if (ip_fast_csum((u8 *)iph, iph->ihl) != 0)
+	if (unlikely(ip_fast_csum((u8 *)iph, iph->ihl)))
 		goto inhdr_error;
 
 	len = ntohs(iph->tot_len);