diff --git a/rtmp/rtmp.go b/rtmp/rtmp.go
index 41a4ccc4..f5053fe9 100644
--- a/rtmp/rtmp.go
+++ b/rtmp/rtmp.go
@@ -795,8 +795,8 @@ func handShake(r *C.RTMP, FP9HandShake int32) int {
 		log.Println("handShake: type mismatch: client sent %v, server sent: %v",
 			clientbuf[0], typ)
 	}
-	//if readN(r, (*byte)(unsafe.Pointer(&serversig[0])), RTMP_SIG_SIZE) != RTMP_SIG_SIZE {
-	if C.ReadN(r, (*C.char)(unsafe.Pointer(&serversig[0])), RTMP_SIG_SIZE) != RTMP_SIG_SIZE {
+	if readN(r, (*byte)(unsafe.Pointer(&serversig[0])), RTMP_SIG_SIZE) != RTMP_SIG_SIZE {
+		//if C.ReadN(r, (*C.char)(unsafe.Pointer(&serversig[0])), RTMP_SIG_SIZE) != RTMP_SIG_SIZE {
 		return 0
 	}