diff --git a/types/index.d.ts b/types/index.d.ts
index aab8e337..45580663 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -63,6 +63,10 @@ export class FSWatcher extends EventEmitter implements fs.FSWatcher {
   on(event: 'unlink'|'unlinkDir', listener: (path: string) => void): this;
 
   on(event: string, listener: (...args: any[]) => void): this;
+
+  ref(): this;
+  
+  unref(): this;
 }
 
 export interface WatchOptions {