diff --git a/src/client/dom/open.ts b/src/client/dom/open.ts
index 5550276..5b9142c 100644
--- a/src/client/dom/open.ts
+++ b/src/client/dom/open.ts
@@ -10,7 +10,7 @@ export default function (client: ScramjetClient) {
 			if (["_parent", "_top", "_unfencedTop"].includes(ctx.args[1]))
 				ctx.args[1] = "_self";
 
-			const realwin = ctx.fn.apply(ctx.this, ctx.args);
+			const realwin = ctx.call();
 
 			if (!realwin) return ctx.return(realwin);
 
diff --git a/src/client/shared/function.ts b/src/client/shared/function.ts
index af489ab..f8b17cb 100644
--- a/src/client/shared/function.ts
+++ b/src/client/shared/function.ts
@@ -2,7 +2,7 @@ import { ScramjetClient, ProxyCtx, Proxy } from "../client";
 import { rewriteJs } from "../../shared";
 
 function rewriteFunction(ctx: ProxyCtx) {
-	const stringifiedFunction = ctx.fn(...ctx.args).toString();
+	const stringifiedFunction = ctx.call().toString();
 
 	ctx.return(ctx.fn(`return ${rewriteJs(stringifiedFunction)}`)());
 }
diff --git a/src/client/shared/unproxy.ts b/src/client/shared/unproxy.ts
index c7c01a7..058e366 100644
--- a/src/client/shared/unproxy.ts
+++ b/src/client/shared/unproxy.ts
@@ -44,7 +44,7 @@ export default function (client: ScramjetClient, self: typeof window) {
 
 	client.Proxy("Object.getOwnPropertyDescriptor", {
 		apply(ctx) {
-			const desc = ctx.fn.apply(ctx.this, ctx.args);
+			const desc = ctx.call();
 
 			if (!desc) return;