diff --git a/code/01-starting-project/src/store/CartProvider.js b/code/01-starting-project/src/store/CartProvider.js
index 65981bb6fd..8a99908115 100644
--- a/code/01-starting-project/src/store/CartProvider.js
+++ b/code/01-starting-project/src/store/CartProvider.js
@@ -21,7 +21,7 @@ const cartReducer = (state, action) => {
     if (existingCartItem) {
       const updatedItem = {
         ...existingCartItem,
-        amount: existingCartItem.amount + action.item.amount,
+        amount: existingCartItem.amount + 1,
       };
       updatedItems = [...state.items];
       updatedItems[existingCartItemIndex] = updatedItem;