diff --git a/qemu.ts b/qemu.ts
index 1ecdbd9..b49a1fb 100644
--- a/qemu.ts
+++ b/qemu.ts
@@ -7,7 +7,7 @@ import { Kernel } from "./kernel.js";
 export async function runQemu(
   squashfs: string,
   kernel: Kernel,
-  { graphic, noShutdown }: { graphic: boolean; noShutdown: boolean } = {
+  { graphic, noShutdown }: { graphic?: boolean; noShutdown?: boolean } = {
     graphic: true,
     noShutdown: false,
   }