diff --git a/rtmp/RTMP.go b/rtmp/RTMP.go
index 73c1cb8d..7a506e41 100644
--- a/rtmp/RTMP.go
+++ b/rtmp/RTMP.go
@@ -41,7 +41,7 @@ type RTMPSession interface {
 }
 
 type rtmpSession struct {
-  rtmp *C.RTMP
+  rtmp *C.struct_RTMP
   url string
   timeout uint
 }
@@ -54,21 +54,21 @@ func NewRTMPSession(url string, connectTimeout uint) (session *rtmpSession){
 }
 
 func (s *rtmpSession) StartSession() error {
-  if !bool(C.RTMP_start_session(s.rtmp, C.(const char*)(s.url), C.uint(connect_timeout))) {
+  if !bool(C.RTMP_start_session(s.rtmp, C.CString(s.url), C.uint(connect_timeout))) {
     return errors.New("RTMP start error! Check rtmp log for details!")
   }
   return nil
 }
 
 func (s *rtmpSession) WriteFrame(data []byte, dataLength uint) error {
-  if !bool(C.RTMP_write_frame(RTMP* rtmp, char* data, C.uint(data_length))) {
+  if !bool(C.RTMP_write_frame(s.rtmp, (*C.char)(unsafe.Pointer(&data[0])), C.uint(data_length))) {
     return errors.New("RTMP write error! Check rtmp log for details!")
   }
   return nil
 }
 
 func (s *rtmpSession) EndSession() error {
-  if !bool(RTMP_end_session(RTMP* rtmp)) {
+  if !bool(C.RTMP_end_session(s.rtmp)) {
     return errors.New("RTMP end session error! Check rtmp log for details!")
   }
   return nil
diff --git a/rtmp/RTMPWrapper.c b/rtmp/RTMPWrapper.c
index 3eaf63f8..ec52b6ea 100644
--- a/rtmp/RTMPWrapper.c
+++ b/rtmp/RTMPWrapper.c
@@ -33,11 +33,11 @@ LICENSE
 #include "rtmp_c/librtmp/log.h"
 #include "lwlog/lwlog.h"
 
-int RTMP_start_session(RTMP* rtmp, const char* url, uint connect_timeout){
+int RTMP_start_session(RTMP* rtmp, char* url, uint connect_timeout){
   rtmp = RTMP_Alloc();
   RTMP_Init(rtmp);
   rtmp->Link.timeout = connect_timeout;
-  if (!RTMP_SetupURL(rtmp, url)) {
+  if (!RTMP_SetupURL(rtmp, (const char*)url)) {
       RTMP_Log(RTMP_LOGERROR, "SetupURL Err\n");
       RTMP_Free(rtmp);
       return 0;
diff --git a/rtmp/RTMPWrapper.h b/rtmp/RTMPWrapper.h
index 63fd597d..0e1f4de0 100644
--- a/rtmp/RTMPWrapper.h
+++ b/rtmp/RTMPWrapper.h
@@ -33,6 +33,6 @@ LICENSE
 #include "rtmp_c/librtmp/log.h"
 #include "lwlog/lwlog.h"
 
-int RTMP_start_session(RTMP* rtmp, const char* url, uint connect_timeout);
+int RTMP_start_session(RTMP* rtmp, char* url, uint connect_timeout);
 int RTMP_write_frame(RTMP* rtmp, char* data, uint data_length);
 int RTMP_end_session(RTMP* rtmp);