diff --git a/rtsp.c b/rtsp.c
index 2f6d59d9..1f386073 100644
--- a/rtsp.c
+++ b/rtsp.c
@@ -361,6 +361,8 @@ static void handle_setup(rtsp_conn_info *conn,
     sprintf(resphdr + strlen(resphdr), ";server_port=%d", sport);
     msg_add_header(resp, "Transport", resphdr);
 
+    msg_add_header(resp, "Session", "1");
+
     resp->respcode = 200;
 }