diff --git a/promptly/promptly.d.ts b/promptly/promptly.d.ts
index 2ad8f33100..ed30f2f3be 100644
--- a/promptly/promptly.d.ts
+++ b/promptly/promptly.d.ts
@@ -3,6 +3,8 @@
 // Definitions by: Dan Spencer <https://github.com/danrspencer>
 // Definitions: https://github.com/borisyankov/DefinitelyTyped
 
+///<reference path="../node/node.d.ts"/>
+
 declare module "promptly" {
 
   interface Callback {
@@ -31,4 +33,4 @@ declare module "promptly" {
   export function choose(message: string, choices: string[], fn?: Callback);
   export function choose(message: string, choices: string[], opts: Options, fn?: Callback);
 
-}
\ No newline at end of file
+}