diff --git a/addons/document/document.py b/addons/document/document.py
index 46d0981cc69..c62f62da2d9 100644
--- a/addons/document/document.py
+++ b/addons/document/document.py
@@ -239,10 +239,10 @@ class document_file(osv.osv):
         if obj_model._name == 'res.partner':
             return res_id
         elif 'partner_id' in obj_model._columns and obj_model._columns['partner_id']._obj == 'res.partner':
-            bro = obj_model.browse(self, cr, uid, res_id, context=context)
+            bro = obj_model.browse(cr, uid, res_id, context=context)
             return bro.partner_id.id
         elif 'address_id' in obj_model._columns and obj_model._columns['address_id']._obj == 'res.partner.address':
-            bro = obj_model.browse(self, cr, uid, res_id, context=context)
+            bro = obj_model.browse(cr, uid, res_id, context=context)
             return bro.address_id.partner_id.id
         return False