diff --git a/addons/delivery/stock.py b/addons/delivery/stock.py
index af7e6e019cd..8b2c09b120c 100644
--- a/addons/delivery/stock.py
+++ b/addons/delivery/stock.py
@@ -82,6 +82,7 @@ class stock_picking(osv.osv):
         """
         carrier_obj = self.pool.get('delivery.carrier')
         grid_obj = self.pool.get('delivery.grid')
+        fpos_obj = self.pool['account.fiscal.position']
         currency_obj = self.pool.get('res.currency')
         if not picking.carrier_id or \
             any(inv_line.product_id.id == picking.carrier_id.product_id.id