diff --git a/src/components/production/WorkOrders/types.ts b/src/components/production/WorkOrders/types.ts
index 02841e31..ba27afd6 100644
--- a/src/components/production/WorkOrders/types.ts
+++ b/src/components/production/WorkOrders/types.ts
@@ -485,7 +485,7 @@ export function transformApiToFrontend(api: WorkOrderApi): WorkOrder {
   return {
     id: String(api.id),
     workOrderNo: api.work_order_no,
-    lotNo: api.sales_order?.options?.bending_lot?.lot_number || api.sales_order?.order_no || '-',
+    lotNo: (api.sales_order?.options?.bending_lot as Record<string, unknown> | undefined)?.lot_number as string || api.sales_order?.order_no || '-',
     processId: api.process_id,
     processName: api.process?.process_name || '-',
     processCode: api.process?.process_code || '-',