diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 1dad7e9..0ea10ee 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -652,6 +652,7 @@
 	arg.flags = (sk && inet_sk(sk)->transparent) ? IP_REPLY_ARG_NOSRCCHECK : 0;
 
 	net = dev_net(skb_dst(skb)->dev);
+	arg.tos = ip_hdr(skb)->tos;
 	ip_send_reply(net->ipv4.tcp_sock, skb, ip_hdr(skb)->saddr,
 		      &arg, arg.iov[0].iov_len);
 
@@ -666,7 +667,7 @@
 static void tcp_v4_send_ack(struct sk_buff *skb, u32 seq, u32 ack,
 			    u32 win, u32 ts, int oif,
 			    struct tcp_md5sig_key *key,
-			    int reply_flags)
+			    int reply_flags, u8 tos)
 {
 	const struct tcphdr *th = tcp_hdr(skb);
 	struct {
@@ -726,7 +727,7 @@
 	arg.csumoffset = offsetof(struct tcphdr, check) / 2;
 	if (oif)
 		arg.bound_dev_if = oif;
-
+	arg.tos = tos;
 	ip_send_reply(net->ipv4.tcp_sock, skb, ip_hdr(skb)->saddr,
 		      &arg, arg.iov[0].iov_len);
 
@@ -743,7 +744,8 @@
 			tcptw->tw_ts_recent,
 			tw->tw_bound_dev_if,
 			tcp_twsk_md5_key(tcptw),
-			tw->tw_transparent ? IP_REPLY_ARG_NOSRCCHECK : 0
+			tw->tw_transparent ? IP_REPLY_ARG_NOSRCCHECK : 0,
+			tw->tw_tos
 			);
 
 	inet_twsk_put(tw);
@@ -757,7 +759,8 @@
 			req->ts_recent,
 			0,
 			tcp_v4_md5_do_lookup(sk, ip_hdr(skb)->daddr),
-			inet_rsk(req)->no_srccheck ? IP_REPLY_ARG_NOSRCCHECK : 0);
+			inet_rsk(req)->no_srccheck ? IP_REPLY_ARG_NOSRCCHECK : 0,
+			ip_hdr(skb)->tos);
 }
 
 /*