diff --git a/include/net/ip_vs.h b/include/net/ip_vs.h
index fedea8d..672564e 100644
--- a/include/net/ip_vs.h
+++ b/include/net/ip_vs.h
@@ -990,12 +990,18 @@
 
 extern __sum16 ip_vs_checksum_complete(struct sk_buff *skb, int offset);
 
-static inline u16 ip_vs_check_diff(u32 old, u32 new, u16 oldsum)
+static inline __wsum ip_vs_check_diff4(__be32 old, __be32 new, __wsum oldsum)
 {
-	u32 diff[2] = { old, new };
+	__be32 diff[2] = { ~old, new };
 
-	return csum_fold(csum_partial((char *) diff, sizeof(diff),
-				      oldsum ^ 0xFFFF));
+	return csum_partial((char *) diff, sizeof(diff), oldsum);
+}
+
+static inline __wsum ip_vs_check_diff2(__be16 old, __be16 new, __wsum oldsum)
+{
+	__be16 diff[2] = { ~old, new };
+
+	return csum_partial((char *) diff, sizeof(diff), oldsum);
 }
 
 #endif /* __KERNEL__ */