diff --git a/order.go b/order.go
index 1cc1412..906aea0 100644
--- a/order.go
+++ b/order.go
@@ -31,7 +31,7 @@ func (c *Client) CreateOrder(intent string, purchaseUnits []PurchaseUnitRequest,
 
 	order := &Order{}
 
-	req, err := c.NewRequest("POST", "/v2/checkout/orders", createOrderRequest{Intent: intent, PurchaseUnits: purchaseUnits, Payer: payer, ApplicationContext: appContext})
+	req, err := c.NewRequest("POST", fmt.Sprintf("%s%s", c.APIBase, "/v2/checkout/orders"), createOrderRequest{Intent: intent, PurchaseUnits: purchaseUnits, Payer: payer, ApplicationContext: appContext})
 
 	if err = c.SendWithAuth(req, order); err != nil {
 		return order, err
diff --git a/types.go b/types.go
index c4204be..42ed11c 100644
--- a/types.go
+++ b/types.go
@@ -337,13 +337,13 @@ type (
 	PurchaseUnitRequest struct {
 		ReferenceID    string              `json:"reference_id,omitempty"`
 		Amount         *PurchaseUnitAmount `json:"amount"`
-		Payee          PayeeForOrders      `json:"payee,omitempty"`
+		Payee          *PayeeForOrders      `json:"payee,omitempty"`
 		Description    string              `json:"description,omitempty"`
 		CustomID       string              `json:"custom_id,omitempty"`
 		InvoiceID      string              `json:"invoice_id,omitempty"`
 		SoftDescriptor string              `json:"soft_descriptor,omitempty"`
 		Items          []Item              `json:"items,omitempty"`
-		Shipping       ShippingDetail      `json:"shipping,omitempty"`
+		Shipping       *ShippingDetail     `json:"shipping,omitempty"`
 	}
 
 	// MerchantPreferences struct