diff --git a/app/Classes/Modules/Transactions/Processors/CreateInvoiceTransactionProcessor.php b/app/Classes/Modules/Transactions/Processors/CreateInvoiceTransactionProcessor.php
index 5ef25141..015c018f 100644
--- a/app/Classes/Modules/Transactions/Processors/CreateInvoiceTransactionProcessor.php
+++ b/app/Classes/Modules/Transactions/Processors/CreateInvoiceTransactionProcessor.php
@@ -135,7 +135,12 @@ class CreateInvoiceTransactionProcessor
 
         $warehouseId = $order->orderRoles()->where('role_id', OrderRoleTypes::ORIGIN_WAREHOUSE)->first()->company_module_id;
         $selected_warehouse_rate = $this->getConstantByKey($warehouse_rate_constant, $warehouseId);
-        $warehouse_rate = is_object($selected_warehouse_rate) ? $selected_warehouse_rate->amount : 0;
+
+        if (is_object($selected_warehouse_rate)) {
+            $warehouse_rate = $selected_warehouse_rate->amount;
+        } elseif (is_array($selected_warehouse_rate)) {
+            $warehouse_rate = $selected_warehouse_rate['amount'] ?? 0;
+        }
 
         $stateId = $address->state_id;
         $state_rate_constant = $this->getConstantByKey($state_rate_constant, $stateId);