diff --git a/clone/clone-tests.ts b/clone/clone-tests.ts
index 6a25fb7c3..8cb0681fd 100644
--- a/clone/clone-tests.ts
+++ b/clone/clone-tests.ts
@@ -1,3 +1,5 @@
+/// <reference path="./clone.d.ts" />
+
 import clone = require("clone");
 
 var original = {