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-rw-r--r--pkg/tcpip/transport/tcp/snd.go2
1 files changed, 1 insertions, 1 deletions
diff --git a/pkg/tcpip/transport/tcp/snd.go b/pkg/tcpip/transport/tcp/snd.go
index b47e279fc..122c52f32 100644
--- a/pkg/tcpip/transport/tcp/snd.go
+++ b/pkg/tcpip/transport/tcp/snd.go
@@ -411,7 +411,7 @@ func (s *sender) sendData() {
if seg.flags == 0 {
// Merge segments if allowed.
if seg.data.Size() != 0 {
- available := int(seg.sequenceNumber.Size(end))
+ available := int(s.sndNxt.Size(end))
if available > limit {
available = limit
}