diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index a8cabc876348..329ae3ccfa35 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -1073,6 +1073,7 @@ static void udp6_hwcsum_outgoing(struct sock *sk, struct sk_buff *skb,
 		 */
 		offset = skb_transport_offset(skb);
 		skb->csum = skb_checksum(skb, offset, skb->len - offset, 0);
+		csum = skb->csum;
 
 		skb->ip_summed = CHECKSUM_NONE;