diff --git a/modules/stock/shipment.py b/modules/stock/shipment.py
index a0caca9..2b90476 100755
--- a/modules/stock/shipment.py
+++ b/modules/stock/shipment.py
@@ -344,7 +344,7 @@ class ShipmentIn(
             },
         help="Where the stock is received.")
     warehouse_input = fields.Many2One(
-        'stock.location', "Warehouse Input", required=True,
+        'stock.location', "Warehouse Input", required=False,
         domain=[
             ['OR',
                 ('type', '=', 'storage'),
@@ -358,7 +358,7 @@ class ShipmentIn(
             'readonly': Eval('state') != 'draft',
             })
     warehouse_storage = fields.Many2One(
-        'stock.location', "Warehouse Storage", required=True,
+        'stock.location', "Warehouse Storage", required=False,
         domain=[
             ('type', 'in', ['storage', 'view']),
             If(Eval('state') == 'draft',