diff --git a/member/models/forms/ProductOrderSubmitForm.php b/member/models/forms/ProductOrderSubmitForm.php
index 063c86b..fa48f2e 100644
--- a/member/models/forms/ProductOrderSubmitForm.php
+++ b/member/models/forms/ProductOrderSubmitForm.php
@@ -129,7 +129,7 @@ class ProductOrderSubmitForm extends BaseModel
         $paymentProductOrder->order_no =  $productOrder['order_no'];
         $paymentProductOrder->pay_order_no = $pay_order_no;
         $paymentProductOrder->amount   = $productOrder['total_pay_price'];
-        if ($productOrder->prescription->category?? 1 === 2) {
+        if ($productOrder->prescription->category === 2) {
             if ($productOrder->delivery_method === 0) {
                 $total_fee   = $productOrder['trans_expenses'];
             }