diff --git a/backbone/backbone.d.ts b/backbone/backbone.d.ts
index f7c5945ad..4e40687a8 100644
--- a/backbone/backbone.d.ts
+++ b/backbone/backbone.d.ts
@@ -4,7 +4,6 @@
 // Definitions: https://github.com/borisyankov/DefinitelyTyped
 
 /// <reference path="../jquery/jquery.d.ts" />
-/// <reference path="../underscore/underscore.d.ts" />
 
 declare module Backbone {