diff --git a/src/Extension/H264.cpp b/src/Extension/H264.cpp
index 60f8ac2a..fdd962c9 100644
--- a/src/Extension/H264.cpp
+++ b/src/Extension/H264.cpp
@@ -146,8 +146,7 @@ bool H264Track::ready() {
 
 void H264Track::inputFrame(const Frame::Ptr &frame) {
     using H264FrameInternal = FrameInternal<H264FrameNoCacheAble>;
-
-    int type = H264_TYPE(*((uint8_t *) frame->data() + frame->prefixSize()));
+    int type = H264_TYPE( frame->data()[frame->prefixSize()]);
     if (type != H264Frame::NAL_B_P && type != H264Frame::NAL_IDR) {
         //非I/B/P帧情况下，split一下，防止多个帧粘合在一起
         splitH264(frame->data(), frame->size(), frame->prefixSize(), [&](const char *ptr, size_t len, size_t prefix) {
@@ -171,7 +170,7 @@ Track::Ptr H264Track::clone() {
 }
 
 void H264Track::inputFrame_l(const Frame::Ptr &frame){
-    int type = H264_TYPE(*((uint8_t *) frame->data() + frame->prefixSize()));
+    int type = H264_TYPE( frame->data()[frame->prefixSize()]);
     switch (type) {
         case H264Frame::NAL_SPS: {
             _sps = string(frame->data() + frame->prefixSize(), frame->size() - frame->prefixSize());
diff --git a/src/Extension/H265.cpp b/src/Extension/H265.cpp
index 53cf7a8f..ac023706 100644
--- a/src/Extension/H265.cpp
+++ b/src/Extension/H265.cpp
@@ -91,8 +91,7 @@ bool H265Track::ready() {
 
 void H265Track::inputFrame(const Frame::Ptr &frame) {
     using H265FrameInternal = FrameInternal<H265FrameNoCacheAble>;
-
-    int type = H265_TYPE(*((uint8_t *) frame->data() + frame->prefixSize()));
+    int type = H265_TYPE( frame->data()[frame->prefixSize()]);
     if (frame->configFrame() || type == H265Frame::NAL_SEI_PREFIX) {
         splitH264(frame->data(), frame->size(), frame->prefixSize(), [&](const char *ptr, size_t len, size_t prefix) {
             H265FrameInternal::Ptr sub_frame = std::make_shared<H265FrameInternal>(frame, (char *) ptr, len, prefix);
@@ -113,7 +112,7 @@ void H265Track::inputFrame_l(const Frame::Ptr &frame) {
 
     _is_idr = false;
     //非idr帧
-    switch (H265_TYPE(((uint8_t *) frame->data() + frame->prefixSize())[0])) {
+    switch (H265_TYPE( frame->data()[frame->prefixSize()])) {
         case H265Frame::NAL_VPS: {
             _vps = string(frame->data() + frame->prefixSize(), frame->size() - frame->prefixSize());
             break;