1 files changed, 3 insertions, 0 deletions

diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
index 34d1b119b720..f087593d64d3 100644
--- a/net/dccp/ipv4.c
+++ b/net/dccp/ipv4.c
@@ -264,7 +264,10 @@ static int dccp_v4_send_response(struct sock *sk, struct request_sock *req,
         skb = dccp_make_response(sk, dst, req);
         if (skb != NULL) {
                 const struct inet_request_sock *ireq = inet_rsk(req);
+                struct dccp_hdr *dh = dccp_hdr(skb);
 
+                dh->dccph_checksum = dccp_v4_checksum(skb, ireq->loc_addr,
+                                                      ireq->rmt_addr);
                 memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
                 err = ip_build_and_send_pkt(skb, sk, ireq->loc_addr,
                                             ireq->rmt_addr,