diff --git a/addons/hr_timesheet_invoice/hr_timesheet_invoice.py b/addons/hr_timesheet_invoice/hr_timesheet_invoice.py
index 9ca2c58b6ff..a24208d6ce0 100644
--- a/addons/hr_timesheet_invoice/hr_timesheet_invoice.py
+++ b/addons/hr_timesheet_invoice/hr_timesheet_invoice.py
@@ -26,8 +26,9 @@ from tools.translate import _
 class hr_timesheet_invoice_factor(osv.osv):
     _name = "hr_timesheet_invoice.factor"
     _description = "Invoice Rate"
+    _order = 'factor'
     _columns = {
-        'name': fields.char('Internal name', size=128, required=True, translate=True),
+        'name': fields.char('Internal Name', size=128, required=True, translate=True),
         'customer_name': fields.char('Name', size=128, help="Label for the customer"),
         'factor': fields.float('Discount (%)', required=True, help="Discount in percentage"),
     }
@@ -122,7 +123,7 @@ class account_analytic_line(osv.osv):
     _inherit = 'account.analytic.line'
     _columns = {
         'invoice_id': fields.many2one('account.invoice', 'Invoice', ondelete="set null"),
-        'to_invoice': fields.many2one('hr_timesheet_invoice.factor', 'Type of Invoicing', help="It allows to set the discount while making invoice"),
+        'to_invoice': fields.many2one('hr_timesheet_invoice.factor', 'Invoiceable', help="It allows to set the discount while making invoice, keep empty if the activities should not be invoiced."),
     }
 
     def _default_journal(self, cr, uid, context=None):