diff --git a/addons/stock/stock.py b/addons/stock/stock.py
index 97d5f9a0270..52645f05233 100644
--- a/addons/stock/stock.py
+++ b/addons/stock/stock.py
@@ -1775,7 +1775,7 @@ class stock_move(osv.osv):
         picking_obj = self.pool.get('stock.picking')
         pick_id= picking_obj.create(cr, uid, {
                                 'name': pick_name,
-                                'origin': str(picking.origin or ''),
+                                'origin': tools.ustr(picking.origin or ''),
                                 'type': ptype,
                                 'note': picking.note,
                                 'move_type': picking.move_type,