diff --git a/src/client/shared/requests/xmlhttprequest.ts b/src/client/shared/requests/xmlhttprequest.ts
index 39f8d1b..ca6fc01 100644
--- a/src/client/shared/requests/xmlhttprequest.ts
+++ b/src/client/shared/requests/xmlhttprequest.ts
@@ -1,18 +1,11 @@
 import { flagEnabled } from "../../../scramjet";
 import { config, unrewriteUrl, rewriteUrl } from "../../../shared";
 import { ScramjetClient } from "../../client";
-let nativeworker;
-let postmessage;
-
-if (self.Worker) {
-	nativeworker = Worker;
-	postmessage = Worker.prototype.postMessage;
-}
 
 export default function (client: ScramjetClient, self: Self) {
 	let worker;
 	if (self.Worker && flagEnabled("syncxhr", client.url)) {
-		worker = new nativeworker(config.files.sync);
+		worker = new client.natives["Worker"](config.files.sync);
 	}
 	const ARGS = Symbol("xhr original args");
 	const HEADERS = Symbol("xhr headers");
@@ -50,7 +43,7 @@ export default function (client: ScramjetClient, self: Self) {
 			const sab = new SharedArrayBuffer(1024, { maxByteLength: 2147483647 });
 			const view = new DataView(sab);
 
-			postmessage.call(worker, {
+			client.natives["Worker.prototype.postMessage"].call(worker, {
 				sab,
 				args,
 				headers: ctx.this[HEADERS],
diff --git a/src/client/shared/worker.ts b/src/client/shared/worker.ts
index d00bd58..dde7749 100644
--- a/src/client/shared/worker.ts
+++ b/src/client/shared/worker.ts
@@ -4,11 +4,6 @@ import { rewriteUrl } from "../../shared";
 import type { MessageC2W } from "../../worker";
 import { ScramjetClient } from "../client";
 
-const sharedworkerpostmessage = MessagePort.prototype.postMessage;
-let workerpostmessage;
-if (self.Worker) {
-	workerpostmessage = Worker.prototype.postMessage;
-}
 export default function (client: ScramjetClient, self: typeof globalThis) {
 	if (self.Worker) {
 		client.Proxy("Worker", {
@@ -26,7 +21,7 @@ export default function (client: ScramjetClient, self: typeof globalThis) {
 
 				(async () => {
 					const port = await conn.getInnerPort();
-					workerpostmessage.call(
+					client.natives["Worker.prototype.postMessage"].call(
 						worker,
 						{
 							$scramjet$type: "baremuxinit",
@@ -71,7 +66,7 @@ export default function (client: ScramjetClient, self: typeof globalThis) {
 
 				(async () => {
 					const port = await conn.getInnerPort();
-					sharedworkerpostmessage.call(
+					client.natives["MessagePort.prototype.postMessage"].call(
 						worker.port,
 						{
 							$scramjet$type: "baremuxinit",