diff --git a/lib/redux/purchase_order/purchase_order_state.dart b/lib/redux/purchase_order/purchase_order_state.dart
index 1346170d0..ea5d5c88c 100644
--- a/lib/redux/purchase_order/purchase_order_state.dart
+++ b/lib/redux/purchase_order/purchase_order_state.dart
@@ -58,7 +58,7 @@ abstract class PurchaseOrderUIState extends Object
     return _$PurchaseOrderUIState._(
       listUIState: ListUIState(
         sortField?.field ?? PurchaseOrderFields.number,
-        sortAscending: sortField?.ascending,
+        sortAscending: sortField?.ascending ?? false,
       ),
       editing: InvoiceEntity(),
       selectedId: '',