diff --git a/packages/web_ui/src/index.ts b/packages/web_ui/src/index.ts
index 601e092c..2053560a 100644
--- a/packages/web_ui/src/index.ts
+++ b/packages/web_ui/src/index.ts
@@ -1,4 +1,4 @@
-/// <reference path="../global.d.ts" />
+/// <reference path="../global.d.ts" preserve="true" />
 export { default as bootstrap } from "./bootstrap";
 export { default as notify, notifyErrorHandler } from "./util/notify";
 export { default as BaseWebPlugin } from "./BaseWebPlugin";