diff --git a/mobile/shop/orderformupdate.php b/mobile/shop/orderformupdate.php
index 1c0e0db48..afa22469a 100644
--- a/mobile/shop/orderformupdate.php
+++ b/mobile/shop/orderformupdate.php
@@ -141,7 +141,7 @@ if($is_member) {
         $arr_it_cp_prc[$it_id] = $dc;
     }
 
-    $tot_od_price = $tot_ct_price - $tot_it_cp_price;
+    $tot_od_price -= $tot_it_cp_price;
 
     // 주문쿠폰
     if($_POST['od_cp_id']) {
diff --git a/shop/orderformupdate.php b/shop/orderformupdate.php
index efd07808c..edffad31b 100644
--- a/shop/orderformupdate.php
+++ b/shop/orderformupdate.php
@@ -135,7 +135,7 @@ if($is_member) {
         $arr_it_cp_prc[$it_id] = $dc;
     }
 
-    $tot_od_price = $tot_ct_price - $tot_it_cp_price;
+    $tot_od_price -= $tot_it_cp_price;
 
     // 주문쿠폰
     if($_POST['od_cp_id']) {