diff --git a/lib/server.js b/lib/server.js
index c406ff7..5cc0ee0 100644
--- a/lib/server.js
+++ b/lib/server.js
@@ -5,6 +5,7 @@ var Bridge = require("hap-nodejs").Bridge;
 var Accessory = require("hap-nodejs").Accessory;
 var Service = require("hap-nodejs").Service;
 var Characteristic = require("hap-nodejs").Characteristic;
+var once = require("hap-nodejs/lib/util/once").once;
 var Plugin = require('./plugin').Plugin;
 var User = require('./user').User;
 var API = require('./api').API;