diff --git a/node/node.d.ts b/node/node.d.ts
index 6d771c9d9f..18d1a378cf 100644
--- a/node/node.d.ts
+++ b/node/node.d.ts
@@ -1719,6 +1719,8 @@ declare module "fs" {
         fd?: number;
         mode?: number;
     }): WriteStream;
+    export function fdatasync(fd: number, callback: Function): void;
+    export function fdatasyncSync(fd: number): void;
 }
 
 declare module "path" {