diff --git a/webrtc/WebRtcSession.cpp b/webrtc/WebRtcSession.cpp
index 856684e3..52478763 100644
--- a/webrtc/WebRtcSession.cpp
+++ b/webrtc/WebRtcSession.cpp
@@ -44,7 +44,7 @@ EventPoller::Ptr QueryPollerByBuffer(const Buffer::Ptr &buffer) {
     if (user_name.empty()) {
         return nullptr;
     }
-    auto ret = WebRtcTransportManager::instance().getItem(user_name);
+    auto ret = WebRtcTransportManager::Instance().getItem(user_name);
     return ret ? ret->getPoller() : nullptr;
 }
 
@@ -62,7 +62,7 @@ void WebRtcSession::onRecv_l(const Buffer::Ptr &buffer) {
         _find_transport = false;
         auto user_name = getUserName(buffer);
         _identifier = user_name + '-' + to_string(reinterpret_cast<uint64_t>(this));
-        auto transport = WebRtcTransportManager::instance().getItem(user_name);
+        auto transport = WebRtcTransportManager::Instance().getItem(user_name);
         CHECK(transport && transport->getPoller()->isCurrentThread());
         transport->setSession(shared_from_this());
         _transport = std::move(transport);
diff --git a/webrtc/WebRtcTransport.cpp b/webrtc/WebRtcTransport.cpp
index 7000ea48..130ff0f3 100644
--- a/webrtc/WebRtcTransport.cpp
+++ b/webrtc/WebRtcTransport.cpp
@@ -857,10 +857,9 @@ uint64_t WebRtcTransportImp::getDuration() const{
 
 /////////////////////////////////////////////////////////////////////////////////////////////
 
-
 void WebRtcTransportImp::registerSelf() {
     _self =  static_pointer_cast<WebRtcTransportImp>(shared_from_this());
-    WebRtcTransportManager::instance().addItem(getIdentifier(), _self);
+    WebRtcTransportManager::Instance().addItem(getIdentifier(), _self);
 }
 
 void WebRtcTransportImp::unrefSelf() {
@@ -869,17 +868,19 @@ void WebRtcTransportImp::unrefSelf() {
 
 void WebRtcTransportImp::unregisterSelf() {
     unrefSelf();
-    WebRtcTransportManager::instance().removeItem(getIdentifier());
+    WebRtcTransportManager::Instance().removeItem(getIdentifier());
 }
 
-WebRtcTransportManager &WebRtcTransportManager::instance() {
+WebRtcTransportManager &WebRtcTransportManager::Instance() {
     static WebRtcTransportManager s_instance;
     return s_instance;
 }
+
 void WebRtcTransportManager::addItem(string key, const WebRtcTransportImp::Ptr &ptr) {
     lock_guard<mutex> lck(_mtx);
     _map[key] = ptr;
 }
+
 WebRtcTransportImp::Ptr WebRtcTransportManager::getItem(const string &key) {
     if (key.empty()) {
         return nullptr;
@@ -891,6 +892,7 @@ WebRtcTransportImp::Ptr WebRtcTransportManager::getItem(const string &key) {
     }
     return it->second.lock();
 }
+
 void WebRtcTransportManager::removeItem(string key) {
     lock_guard<mutex> lck(_mtx);
     _map.erase(key);
diff --git a/webrtc/WebRtcTransport.h b/webrtc/WebRtcTransport.h
index eb2a72cc..02c4cb0d 100644
--- a/webrtc/WebRtcTransport.h
+++ b/webrtc/WebRtcTransport.h
@@ -226,13 +226,14 @@ private:
 };
 
 class WebRtcTransportManager {
+public:
+    static WebRtcTransportManager &Instance();
+    void addItem(string key, const WebRtcTransportImp::Ptr &ptr);
+    void removeItem(string key);
+    WebRtcTransportImp::Ptr getItem(const string &key);
+
+private:
+    WebRtcTransportManager() = default;
     mutable mutex _mtx;
     unordered_map<string, weak_ptr<WebRtcTransportImp> > _map;
-    WebRtcTransportManager() = default;
-
-public:
-    static WebRtcTransportManager& instance();
-    void addItem(string key, const WebRtcTransportImp::Ptr &ptr);
-    WebRtcTransportImp::Ptr getItem(const string &key);
-    void removeItem(string key);
 };
\ No newline at end of file