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-rw-r--r--src/vnet/tcp/tcp_output.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/vnet/tcp/tcp_output.c b/src/vnet/tcp/tcp_output.c
index f5035006822..95480af0f2d 100644
--- a/src/vnet/tcp/tcp_output.c
+++ b/src/vnet/tcp/tcp_output.c
@@ -1749,7 +1749,7 @@ tcp_retransmit_sack (tcp_worker_ctx_t * wrk, tcp_connection_t * tc,
&& tc->rxt_head != tc->snd_una
&& tcp_retransmit_should_retry_head (tc, sb))
{
- max_bytes = clib_min (tc->snd_mss, tc->snd_congestion - tc->snd_una);
+ max_bytes = clib_min (tc->snd_mss, tc->snd_nxt - tc->snd_una);
n_written = tcp_prepare_retransmit_segment (wrk, tc, 0, max_bytes, &b);
if (!n_written)
{