diff --git a/interfaces/src/index.ts b/interfaces/src/index.ts
index 667256aa6a..d3c221bd5c 100644
--- a/interfaces/src/index.ts
+++ b/interfaces/src/index.ts
@@ -1,4 +1,46 @@
 import 'reflect-metadata';
+import EventEmitter from 'events';
+import fs, { WatchOptions } from 'fs';
+
+declare class FSWatcher extends EventEmitter implements fs.FSWatcher{
+    options: WatchOptions
+
+    ref(): this; // <-- added
+    unref(): this; // <-- added
+
+    close(): void;
+
+    /**
+     * events.EventEmitter
+     *   1. change
+     *   2. error
+     */
+    addListener(event: string, listener: (...args: any[]) => void): this;
+    addListener(event: 'change', listener: (eventType: string, filename: string | Buffer) => void): this;
+    addListener(event: 'error', listener: (error: Error) => void): this;
+    addListener(event: 'close', listener: () => void): this;
+
+    on(event: string, listener: (...args: any[]) => void): this;
+    on(event: 'change', listener: (eventType: string, filename: string | Buffer) => void): this;
+    on(event: 'error', listener: (error: Error) => void): this;
+    on(event: 'close', listener: () => void): this;
+
+    once(event: string, listener: (...args: any[]) => void): this;
+    once(event: 'change', listener: (eventType: string, filename: string | Buffer) => void): this;
+    once(event: 'error', listener: (error: Error) => void): this;
+    once(event: 'close', listener: () => void): this;
+
+    prependListener(event: string, listener: (...args: any[]) => void): this;
+    prependListener(event: 'change', listener: (eventType: string, filename: string | Buffer) => void): this;
+    prependListener(event: 'error', listener: (error: Error) => void): this;
+    prependListener(event: 'close', listener: () => void): this;
+
+    prependOnceListener(event: string, listener: (...args: any[]) => void): this;
+    prependOnceListener(event: 'change', listener: (eventType: string, filename: string | Buffer) => void): this;
+    prependOnceListener(event: 'error', listener: (error: Error) => void): this;
+    prependOnceListener(event: 'close', listener: () => void): this;
+}
+
 export * from './type';
 export * from './interface';
 export * from './helpers';