diff --git a/rtmp/rtmp.go b/rtmp/rtmp.go
index 4bcd085b..671836a0 100644
--- a/rtmp/rtmp.go
+++ b/rtmp/rtmp.go
@@ -341,9 +341,9 @@ func rtmpWrite(r *C.RTMP, data []byte) int {
 
 			pkt.m_packetType = C.uint8_t(*indxBytePtr(buf, 0))
 			buf = incBytePtr(buf, 1)
-			pkt.m_nBodySize = C.uint32_t(C.AMF_DecodeInt24((*C.char)(buf)))
+			pkt.m_nBodySize = C.uint32_t(afmDecodeInt24((*byte)(buf)))
 			buf = incBytePtr(buf, 3)
-			pkt.m_nTimeStamp = C.uint32_t(C.AMF_DecodeInt24((*C.char)(buf)))
+			pkt.m_nTimeStamp = C.uint32_t(afmDecodeInt24((*byte)(buf)))
 			buf = incBytePtr(buf, 3)
 			pkt.m_nTimeStamp |= C.uint32_t(*indxBytePtr(buf, 0)) << 24
 			buf = incBytePtr(buf, 4)
@@ -410,9 +410,12 @@ func rtmpWrite(r *C.RTMP, data []byte) int {
 
 // afmDecodeInt24 decodes data into an unsigned int
 func afmDecodeInt24(data *byte) uint32 {
-	dataPtr := unsafe.Pointer(data)
-
-	return (uint32)(*data)<<16 | *(*uint32)(incBytePtr(dataPtr, 1))<<8 | *(*uint32)(incBytePtr(dataPtr, 2))
+	// TODO Understand logic and simplify
+	c := (*uint8)(unsafe.Pointer(data))
+	dst := uint32(int32(*c) << 16)
+	dst |= uint32(int32(*((*uint8)(unsafe.Pointer(uintptr(unsafe.Pointer(c)) + (uintptr)(int32(1))*unsafe.Sizeof(*c))))) << 8)
+	dst |= uint32(int32(*((*uint8)(unsafe.Pointer(uintptr(unsafe.Pointer(c)) + (uintptr)(int32(2))*unsafe.Sizeof(*c))))))
+	return dst
 }
 
 func afmEncodeString(output *byte, outend *byte, bv *C.AVal) *byte {