diff --git a/lib/server.js b/lib/server.js
index a9b43b9ec..bda18b491 100644
--- a/lib/server.js
+++ b/lib/server.js
@@ -182,6 +182,11 @@ Server.prototype.close = function(){
       this.clients[i].close(true);
     }
   }
+  if (this.ws) {
+    debug('closing webSocketServer');
+    this.ws.close();
+    delete this.ws;
+  }
   return this;
 };