diff --git a/index.d.ts b/index.d.ts
index ede727e8..bd405bb5 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -2178,6 +2178,7 @@ declare namespace Shopify {
   }
 
   interface IOrderShippingLine {
+    id: number;
     code: string;
     discounted_price: string;
     discounted_price_set: IMoneySet;