diff --git a/libavformat/rtmp.h b/libavformat/rtmp.h
index c9aa67e056..b9c5f1e430 100644
--- a/libavformat/rtmp.h
+++ b/libavformat/rtmp.h
@@ -32,15 +32,6 @@
 #define HMAC_IPAD_VAL 0x36
 #define HMAC_OPAD_VAL 0x5C
 
-/**
- * A non-zero transaction id requires the server to send back
- * a _result or _error response.
- * Setting it to 0 marks the message as a notification not
- * requiring feedback.
- */
-
-#define RTMP_NOTIFICATION 0
-
 /**
  * emulated Flash client version - 9.0.124.2 on Linux
  * @{
diff --git a/libavformat/rtmpproto.c b/libavformat/rtmpproto.c
index 1db3152e8d..150e45a363 100644
--- a/libavformat/rtmpproto.c
+++ b/libavformat/rtmpproto.c
@@ -626,7 +626,7 @@ static int gen_check_bw(URLContext *s, RTMPContext *rt)
 
     p = pkt.data;
     ff_amf_write_string(&p, "_checkbw");
-    ff_amf_write_number(&p, RTMP_NOTIFICATION);
+    ff_amf_write_number(&p, ++rt->nb_invokes);
     ff_amf_write_null(&p);
 
     return rtmp_send_packet(rt, &pkt, 0);