diff --git a/a8/websocketclient.cc b/a8/websocketclient.cc
index 041dc12..a3451a2 100644
--- a/a8/websocketclient.cc
+++ b/a8/websocketclient.cc
@@ -38,6 +38,26 @@ namespace a8
         tcp_client_ = std::make_shared<AsioTcpClient>(io_context, remote_ip, remote_port);
         decoded_buff_ = (char *)malloc(1024 * 64 + 1);
         decoded_bufflen_ = 0;
+        tcp_client_->on_error =
+            [] (a8::AsioTcpClient* socket, int err)
+            {
+
+            };
+        tcp_client_->on_connect =
+            [] (a8::AsioTcpClient* socket)
+            {
+
+            };
+        tcp_client_->on_disconnect =
+            [] (a8::AsioTcpClient* socket)
+            {
+
+            };
+        tcp_client_->on_socketread =
+            [] (a8::AsioTcpClient* socket, char* buf, unsigned int buf_len)
+            {
+
+            };
     }
 
     WebSocketClient::~WebSocketClient()