diff --git a/utils/TcpModule/src/TcpServerImpl.h b/utils/TcpModule/src/TcpServerImpl.h
index 007f63fb..44dd08a4 100644
--- a/utils/TcpModule/src/TcpServerImpl.h
+++ b/utils/TcpModule/src/TcpServerImpl.h
@@ -52,9 +52,9 @@ public:
     void Closed(void);
 
 private:
-    std::mutex mMutex;
-    hloop_t *mLoop;
-    hio_t *mIo;
+    std::mutex mMutex;    ///A mutex lock used to synchronize access to shared resources. 
+    hloop_t *mLoop;       ///Event loop, listening for io objects
+    hio_t *mIo;            ///Socket handle
     const TcpServerParam mParam;
     std::thread mTcpServerThread;
     std::map<int, std::shared_ptr<ITcpClientAccept> *> mClients;