diff --git a/pkg/sfu/buffer/rtpstats.go b/pkg/sfu/buffer/rtpstats.go
index c6bfcd874..a68b83553 100644
--- a/pkg/sfu/buffer/rtpstats.go
+++ b/pkg/sfu/buffer/rtpstats.go
@@ -682,7 +682,7 @@ func (r *RTPStats) ToProto() *livekit.RTPStats {
 		return nil
 	}
 
-	packetsExpected := r.getExtHighestSN() - r.extStartSN
+	packetsExpected := r.getExtHighestSN() - r.extStartSN + 1
 
 	packets := packetsExpected
 	if r.packetsLost < packets {