diff --git a/src/classes/emulator.ts b/src/classes/emulator.ts
index 2731318..f8d6661 100644
--- a/src/classes/emulator.ts
+++ b/src/classes/emulator.ts
@@ -471,10 +471,10 @@ export class Emulator {
 
     const { getEmscripten } = await importCoreJsAsESM(core)
     checkIsAborted(this.options.signal)
-    const emscripten: EmulatorEmscripten = await getEmscripten({ Module: initialModule })
+    const emscripten = await getEmscripten({ Module: initialModule })
     checkIsAborted(this.options.signal)
-    this.emscripten = emscripten
-    const { Module } = emscripten
+    const Module = (emscripten as EmulatorEmscripten).Module ?? emscripten
+    this.emscripten = { ...(emscripten as EmulatorEmscripten), Module }
     await Module.monitorRunDependencies()
     checkIsAborted(this.options.signal)
   }
diff --git a/src/types/retroarch-emscripten.ts b/src/types/retroarch-emscripten.ts
index 8e46728..38ee3e0 100644
--- a/src/types/retroarch-emscripten.ts
+++ b/src/types/retroarch-emscripten.ts
@@ -6,6 +6,7 @@ export interface RetroArchEmscriptenModule extends EmscriptenModule {
   EmscriptenSendCommand?: (command: string) => void
   ERRNO_CODES: any
   FS: any
+  mainScriptUrlOrBlob: string
   monitorRunDependencies: (left?: number) => Promise<void> | void
   PATH: any
   preRun: ((...args: any) => void)[]