diff --git a/convert-source-map/convert-source-map-tests.ts b/convert-source-map/convert-source-map-tests.ts
index a89cfb712..1701e0065 100644
--- a/convert-source-map/convert-source-map-tests.ts
+++ b/convert-source-map/convert-source-map-tests.ts
@@ -1,3 +1,5 @@
+/// <reference path="./convert-source-map.d.ts" />
+
 import convert = require("convert-source-map");
 
 var json = convert
@@ -10,4 +12,4 @@ var modified = convert
 	.toJSON();
 
 console.log(json);
-console.log(modified);
\ No newline at end of file
+console.log(modified);