diff --git a/libavformat/rtmpproto.c b/libavformat/rtmpproto.c
index 5298c18790..49a40dd66a 100644
--- a/libavformat/rtmpproto.c
+++ b/libavformat/rtmpproto.c
@@ -2416,7 +2416,7 @@ static int get_packet(URLContext *s, int for_header)
         rt->last_timestamp = rpkt.timestamp;
 
         rt->bytes_read += ret;
-        if (rt->bytes_read > rt->last_bytes_read + rt->client_report_size) {
+        if (rt->bytes_read - rt->last_bytes_read > rt->client_report_size) {
             av_log(s, AV_LOG_DEBUG, "Sending bytes read report\n");
             if ((ret = gen_bytes_read(s, rt, rpkt.timestamp + 1)) < 0)
                 return ret;