diff --git a/addons/stock_account/wizard/stock_valuation_history.py b/addons/stock_account/wizard/stock_valuation_history.py
index 06ef0aeefc9..193b19cbc7b 100644
--- a/addons/stock_account/wizard/stock_valuation_history.py
+++ b/addons/stock_account/wizard/stock_valuation_history.py
@@ -49,20 +49,19 @@ class stock_history(osv.osv):
         prod_dict = {}
         if 'inventory_value' in fields:
             for line in res:
-                if '__domain' in line:
-                    lines = self.search(cr, uid, line['__domain'], context=context)
-                    inv_value = 0.0
-                    product_tmpl_obj = self.pool.get("product.template")
-                    lines_rec = self.browse(cr, uid, lines, context=context)
-                    for line_rec in lines_rec:
-                        if line_rec.product_id.cost_method == 'real':
-                            price = line_rec.price_unit_on_quant
-                        else:
-                            if not line_rec.product_id.id in prod_dict:
-                                prod_dict[line_rec.product_id.id] = product_tmpl_obj.get_history_price(cr, uid, line_rec.product_id.product_tmpl_id.id, line_rec.company_id.id, date=date, context=context)
-                            price = prod_dict[line_rec.product_id.id]
-                        inv_value += price * line_rec.quantity
-                    line['inventory_value'] = inv_value
+                lines = self.search(cr, uid, line.get('__domain', []), context=context)
+                inv_value = 0.0
+                product_tmpl_obj = self.pool.get("product.template")
+                lines_rec = self.browse(cr, uid, lines, context=context)
+                for line_rec in lines_rec:
+                    if line_rec.product_id.cost_method == 'real':
+                        price = line_rec.price_unit_on_quant
+                    else:
+                        if not line_rec.product_id.id in prod_dict:
+                            prod_dict[line_rec.product_id.id] = product_tmpl_obj.get_history_price(cr, uid, line_rec.product_id.product_tmpl_id.id, line_rec.company_id.id, date=date, context=context)
+                        price = prod_dict[line_rec.product_id.id]
+                    inv_value += price * line_rec.quantity
+                line['inventory_value'] = inv_value
         return res
 
     def _get_inventory_value(self, cr, uid, ids, name, attr, context=None):