diff --git a/net/core/utils.c b/net/core/utils.c
index eed34338736c..efc76dd9dcd1 100644
--- a/net/core/utils.c
+++ b/net/core/utils.c
@@ -306,16 +306,14 @@ EXPORT_SYMBOL(in6_pton);
 void inet_proto_csum_replace4(__sum16 *sum, struct sk_buff *skb,
 			      __be32 from, __be32 to, int pseudohdr)
 {
-	__be32 diff[] = { ~from, to };
 	if (skb->ip_summed != CHECKSUM_PARTIAL) {
-		*sum = csum_fold(csum_partial(diff, sizeof(diff),
-				~csum_unfold(*sum)));
+		*sum = csum_fold(csum_add(csum_sub(~csum_unfold(*sum), from),
+				 to));
 		if (skb->ip_summed == CHECKSUM_COMPLETE && pseudohdr)
-			skb->csum = ~csum_partial(diff, sizeof(diff),
-						~skb->csum);
+			skb->csum = ~csum_add(csum_sub(~(skb->csum), from), to);
 	} else if (pseudohdr)
-		*sum = ~csum_fold(csum_partial(diff, sizeof(diff),
-				csum_unfold(*sum)));
+		*sum = ~csum_fold(csum_add(csum_sub(csum_unfold(*sum), from),
+				  to));
 }
 EXPORT_SYMBOL(inet_proto_csum_replace4);