diff --git a/addons/stock/models/stock_pack_operation.py b/addons/stock/models/stock_pack_operation.py
index 7d753493541..1c7251e7a80 100644
--- a/addons/stock/models/stock_pack_operation.py
+++ b/addons/stock/models/stock_pack_operation.py
@@ -113,7 +113,7 @@ class PackOperation(models.Model):
     @api.multi
     def _compute_location_description(self):
         for operation, operation_sudo in zip(self, self.sudo()):
-            operation.from_loc = '%s%s' % (operation_sudo.location_id.name, self.product_id and operation_sudo.package_id.name or '')
+            operation.from_loc = '%s%s' % (operation_sudo.location_id.name, operation.product_id and operation_sudo.package_id.name or '')
             operation.to_loc = '%s%s' % (operation_sudo.location_dest_id.name, operation_sudo.result_package_id.name or '')
 
     @api.one