diff --git a/src/runtime.ts b/src/runtime.ts
index 719e1c8..c7c9b26 100644
--- a/src/runtime.ts
+++ b/src/runtime.ts
@@ -130,6 +130,8 @@ function resolve(parent?: string, specifier?: string) {
 	}
 }
 function patch(id: string, exports: object) {
+	// @ts-expect-error
+	exports.__esModule = true;
 	switch (id) {
 		case 'node:fs':
 			return patchFS(exports as typeof FS);