diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index 8be3681d3d80..3c58846fcaa5 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -296,7 +296,7 @@ void netpoll_send_udp(struct netpoll *np, const char *msg, int len)
 					udp_len, IPPROTO_UDP,
 					csum_partial((unsigned char *)udph, udp_len, 0));
 	if (udph->check == 0)
-		udph->check = -1;
+		udph->check = CSUM_MANGLED_0;
 
 	skb->nh.iph = iph = (struct iphdr *)skb_push(skb, sizeof(*iph));