diff --git a/src/emitter.js b/src/emitter.js
index 2d076613be..aa88cd5024 100644
--- a/src/emitter.js
+++ b/src/emitter.js
@@ -1,4 +1,6 @@
+"use strict";
+
 var events = require('events'),
 	eventEmitter = new events.EventEmitter();
 
-module.exports = eventEmitter;
+module.exports = eventEmitter;
\ No newline at end of file