diff --git a/src/client/shared/import.ts b/src/client/shared/import.ts
index 6f1811e..8b23bf8 100644
--- a/src/client/shared/import.ts
+++ b/src/client/shared/import.ts
@@ -3,7 +3,7 @@ import { config } from "../../shared";
 import { rewriteUrl } from "../../shared/rewriters/url";
 
 export default function (client: ScramjetClient, self: Self) {
-	const Function = client.natives.Function;
+	const Function = client.natives["Function"];
 
 	self[config.globals.importfn] = function (base: string) {
 		return function (url: string) {
diff --git a/src/client/shared/requests/xmlhttprequest.ts b/src/client/shared/requests/xmlhttprequest.ts
index ca6fc01..2fc0c4f 100644
--- a/src/client/shared/requests/xmlhttprequest.ts
+++ b/src/client/shared/requests/xmlhttprequest.ts
@@ -5,7 +5,9 @@ import { ScramjetClient } from "../../client";
 export default function (client: ScramjetClient, self: Self) {
 	let worker;
 	if (self.Worker && flagEnabled("syncxhr", client.url)) {
-		worker = new client.natives["Worker"](config.files.sync);
+		worker = new (client.natives["Worker"] ? client.natives["Worker"] : Worker)(
+			config.files.sync
+		);
 	}
 	const ARGS = Symbol("xhr original args");
 	const HEADERS = Symbol("xhr headers");