diff --git a/rtmp/rtmp.go b/rtmp/rtmp.go
index 804484e5..da14d4e6 100644
--- a/rtmp/rtmp.go
+++ b/rtmp/rtmp.go
@@ -867,7 +867,7 @@ func C_ReadN(r *C.RTMP, buffer *byte, n int) int {
 			if r.m_bSendCounter != 0 && r.m_nBytesIn > (r.m_nBytesInSent+
 				r.m_nClientBW/10) {
 				//if C.SendBytesReceived(r) == 0 {
-				if sendBytesReceived(r) == 0 {
+				if C_SendBytesReceived(r) == 0 {
 					return 0
 				}
 			}
@@ -912,7 +912,7 @@ func C_RTMP_SockBuffFill(sb *C.RTMPSockBuf) int {
 	return nBytes
 }
 
-func sendBytesReceived(r *C.RTMP) int {
+func C_SendBytesReceived(r *C.RTMP) int {
 	var packet C.RTMPPacket
 	var pbuf [256]byte
 	pend := (*byte)(incBytePtr(unsafe.Pointer(&pbuf[0]), 256))