diff --git a/[refs] b/[refs]
index 3c897ec243e6..ce32b1bbbcc6 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: f71b70e115dd0bb34eee4d281a4fb6416e88cfff
+refs/heads/master: e5700aff144fbbba46be40049f0c55fb57283777
diff --git a/trunk/net/ipv6/tcp_ipv6.c b/trunk/net/ipv6/tcp_ipv6.c
index 5d2e4301e246..1ababbb41131 100644
--- a/trunk/net/ipv6/tcp_ipv6.c
+++ b/trunk/net/ipv6/tcp_ipv6.c
@@ -1054,6 +1054,9 @@ static void tcp_v6_send_response(struct sk_buff *skb, u32 seq, u32 ack, u32 win,
 	ipv6_addr_copy(&fl.fl6_dst, &ipv6_hdr(skb)->saddr);
 	ipv6_addr_copy(&fl.fl6_src, &ipv6_hdr(skb)->daddr);
 
+	buff->ip_summed = CHECKSUM_PARTIAL;
+	buff->csum = 0;
+
 	__tcp_v6_send_check(buff, &fl.fl6_src, &fl.fl6_dst);
 
 	fl.proto = IPPROTO_TCP;