diff --git a/types/node/index.d.ts b/types/node/index.d.ts
index 485ad421de..bf59ae2a32 100644
--- a/types/node/index.d.ts
+++ b/types/node/index.d.ts
@@ -2597,8 +2597,8 @@ declare module "fs" {
      */
     export function mkdtempSync(prefix: string): string;
     export function readdir(path: string | Buffer, callback: (err: NodeJS.ErrnoException, files: string[]) => void): void;
-    export function readdir(path: string | Buffer, options: string | Object, callback: (err: NodeJS.ErrnoException, files: string[]) => void): void;
-    export function readdirSync(path: string | Buffer, options?: string | Object): string[];
+    export function readdir(path: string | Buffer, options: string | {}, callback: (err: NodeJS.ErrnoException, files: string[]) => void): void;
+    export function readdirSync(path: string | Buffer, options?: string | {}): string[];
     export function close(fd: number, callback?: (err?: NodeJS.ErrnoException) => void): void;
     export function closeSync(fd: number): void;
     export function open(path: string | Buffer, flags: string | number, callback: (err: NodeJS.ErrnoException, fd: number) => void): void;