diff --git a/dao/socketServer.js b/dao/socketServer.js
index 0296196..b1ade75 100644
--- a/dao/socketServer.js
+++ b/dao/socketServer.js
@@ -291,7 +291,7 @@ function startServer() {
                 'error',
                 err
             );
-        }
+        }.bind(this)
     );
 
     this.server.maxConnections=this.config.maxConnections;