diff --git a/rtmp/server.go b/rtmp/server.go
index dd0e02b..94e9994 100644
--- a/rtmp/server.go
+++ b/rtmp/server.go
@@ -10,6 +10,7 @@ type ProtocolParams struct {
 	peer_ack_win uint32
 	curr_read uint32
 	stream_key string
+	trans_id float64
 }
 
 func NewServer(port string) (error) {