diff --git a/addons/account/account.py b/addons/account/account.py
index 4eb99dc4bd4..878f8759239 100644
--- a/addons/account/account.py
+++ b/addons/account/account.py
@@ -155,6 +155,7 @@ class account_account_type(osv.osv):
         return res
 
     def _save_report_type(self, cr, uid, account_type_id, field_name, field_value, arg, context=None):
+        field_value = field_value or 'none'
         obj_data = self.pool.get('ir.model.data')
         obj_financial_report = self.pool.get('account.financial.report')
         #unlink if it exists somewhere in the financial reports related to BS or PL