diff --git a/stack-trace/stack-trace-tests.ts b/stack-trace/stack-trace-tests.ts
index a0b2f8d55..c18f63751 100644
--- a/stack-trace/stack-trace-tests.ts
+++ b/stack-trace/stack-trace-tests.ts
@@ -1,3 +1,5 @@
+/// <reference path="./stack-trace.d.ts" />
+
 import stackTrace = require('stack-trace');
 
 var currentStackTrace = stackTrace.get();