diff --git a/engines/order_management/app/services/order_management/order/updater.rb b/engines/order_management/app/services/order_management/order/updater.rb
index cfad39a473..b27f65ce22 100644
--- a/engines/order_management/app/services/order_management/order/updater.rb
+++ b/engines/order_management/app/services/order_management/order/updater.rb
@@ -52,7 +52,7 @@ module OrderManagement
       end
 
       def update_item_total
-        order.item_total = line_items.map(&:amount).sum
+        order.item_total = line_items.sum('price * quantity')
         update_order_total
       end