diff --git a/fixtures/typings-test/tsconfig.json b/fixtures/typings-test/tsconfig.json
index 699a055a..e10b6955 100644
--- a/fixtures/typings-test/tsconfig.json
+++ b/fixtures/typings-test/tsconfig.json
@@ -5,6 +5,9 @@
   "compilerOptions": {
     "module": "commonjs",
     "target": "es5",
+    "lib": [
+      "es6"
+    ],
     "noEmit": true
   }
 }