diff --git a/addons/stock_account/stock_account.py b/addons/stock_account/stock_account.py
index 243d982f8f6..2fcc661c079 100644
--- a/addons/stock_account/stock_account.py
+++ b/addons/stock_account/stock_account.py
@@ -241,7 +241,7 @@ class stock_quant(osv.osv):
                                       'line_id': move_lines,
                                       'period_id': period_id,
                                       'date': move.date,
-                                      'ref': move.picking_id and move.picking_id.name}, context=context)
+                                      'ref': move.picking_id.name}, context=context)
 
     #def _reconcile_single_negative_quant(self, cr, uid, to_solve_quant, quant, quant_neg, qty, context=None):
     #    move = self._get_latest_move(cr, uid, to_solve_quant, context=context)