diff --git a/rtmp/rtmp.go b/rtmp/rtmp.go
index 3f675515..5c61e42a 100644
--- a/rtmp/rtmp.go
+++ b/rtmp/rtmp.go
@@ -821,7 +821,8 @@ func readN(r *C.RTMP, buffer *byte, n int) int {
 
 		avail = int(r.m_sb.sb_size)
 		if avail == 0 {
-			if C.RTMPSockBuf_Fill(&r.m_sb) < 1 {
+			if rtmpSockBufFill(&r.m_sb) < 1 {
+				// if C.RTMPSockBuf_Fill(&r.m_sb) < 1 {
 				if r.m_sb.sb_timedout == 0 {
 					return 0
 				}
@@ -864,6 +865,31 @@ func readN(r *C.RTMP, buffer *byte, n int) int {
 	return nOriginalSize - n
 }
 
+func rtmpSockBufFill(sb *C.RTMPSockBuf) int {
+	var nBytes int
+
+	if sb.sb_size == 0 {
+		sb.sb_start = &sb.sb_buf[0]
+	}
+
+	for {
+		nBytes = int(unsafe.Sizeof(sb.sb_buf)) - 1 - int(sb.sb_size) -
+			int(uintptr(unsafe.Pointer(sb.sb_start))-uintptr(unsafe.Pointer(
+				&sb.sb_buf[0])))
+
+		nBytes = int(C.recv(sb.sb_socket, unsafe.Pointer(uintptr(unsafe.Pointer(
+			sb.sb_start))+uintptr(int(sb.sb_size))), C.size_t(nBytes), 0))
+
+		if nBytes != -1 {
+			sb.sb_size += C.int(nBytes)
+		} else {
+			log.Println("rtmpSockBufFill: recv error!")
+		}
+		break
+	}
+	return nBytes
+}
+
 func sendConnectPacket(r *C.RTMP, cp *C.RTMPPacket) int {
 	var packet C.RTMPPacket
 	var pbuf [4096]byte