diff --git a/addons/website_sale/controllers/main.py b/addons/website_sale/controllers/main.py
index 680be96df9d..256857fbfce 100644
--- a/addons/website_sale/controllers/main.py
+++ b/addons/website_sale/controllers/main.py
@@ -187,6 +187,7 @@ class website_sale(http.Controller):
 
         attrib_list = request.httprequest.args.getlist('attrib')
         attrib_values = [map(int, v.split("-")) for v in attrib_list if v]
+        attributes_ids = set([v[0] for v in attrib_values])
         attrib_set = set([v[1] for v in attrib_values])
 
         domain = self._get_search_domain(search, category, attrib_values)
@@ -231,7 +232,8 @@ class website_sale(http.Controller):
         products = product_obj.browse(cr, uid, product_ids, context=context)
 
         attributes_obj = request.registry['product.attribute']
-        attributes_ids = attributes_obj.search(cr, uid, [('attribute_line_ids.product_tmpl_id', 'in', product_ids)], context=context)
+        if product_ids:
+            attributes_ids = attributes_obj.search(cr, uid, [('attribute_line_ids.product_tmpl_id', 'in', product_ids)], context=context)
         attributes = attributes_obj.browse(cr, uid, attributes_ids, context=context)
 
         from_currency = pool['res.users'].browse(cr, uid, uid, context=context).company_id.currency_id