diff --git a/src/@ionic-native/plugins/in-app-purchase-2/index.ts b/src/@ionic-native/plugins/in-app-purchase-2/index.ts
index 02496afbc9..b08fd658de 100644
--- a/src/@ionic-native/plugins/in-app-purchase-2/index.ts
+++ b/src/@ionic-native/plugins/in-app-purchase-2/index.ts
@@ -73,7 +73,7 @@ import { Injectable } from '@angular/core';
 
 export interface IAPProductOptions {
   id: string;
-  alias: string;
+  alias?: string;
   type: string;
 }