diff --git a/rtmp/rtmp.go b/rtmp/rtmp.go
index 671836a0..7f9515fd 100644
--- a/rtmp/rtmp.go
+++ b/rtmp/rtmp.go
@@ -36,6 +36,7 @@ package rtmp
 #include <stdlib.h>
 #include <string.h>
 #include <rtmp.h>
+#include <sys/socket.h>
 
 typedef enum {
   RTMPT_OPEN=0, RTMPT_SEND, RTMPT_IDLE, RTMPT_CLOSE
@@ -798,6 +799,10 @@ func httpPost(r *C.RTMP, cmd C.RTMPTCmd, buf *byte, l int) int {
 	return hlen
 }
 
+func sockBufSend(sb *C.RTMPSockBuf, buf *byte, l int32) int32 {
+	return int32(C.send(sb.sb_socket, unsafe.Pointer(buf), C.size_t(l), 0))
+}
+
 // TODO: port RTMP_METHOD
 func avQueue(vals **C.RTMP_METHOD, num *int, av *C.AVal, txn int) {
 	var rtmpMethodPtr *C.RTMP_METHOD