1 files changed, 1 insertions, 0 deletions

diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index c379a242abb3..d9d4d191e8f3 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -2489,6 +2489,7 @@ static int __net_init tcp_sk_init(struct net *net)
         net->ipv4.sysctl_tcp_slow_start_after_idle = 1; /* By default, RFC2861 behavior.  */
         net->ipv4.sysctl_tcp_retrans_collapse = 1;
         net->ipv4.sysctl_tcp_max_reordering = 300;
+        net->ipv4.sysctl_tcp_dsack = 1;
 
         net->ipv4.sysctl_tcp_fastopen = TFO_CLIENT_ENABLE;
         spin_lock_init(&net->ipv4.tcp_fastopen_ctx_lock);