diff --git a/lib/events.js b/lib/events.js
index 673594c..821615d 100644
--- a/lib/events.js
+++ b/lib/events.js
@@ -51,7 +51,7 @@ var Events = Backbone.Events = {
     if (!this._events || !eventsApi(this, 'off', name, [callback, context]))
       return this;
     if (!name && !callback && !context) {
-      delete this._events;
+      this._events = undefined;
       return this;
     }