diff --git a/addons/analytic_user_function/analytic_user_function.py b/addons/analytic_user_function/analytic_user_function.py
index 9233845f7eb..7ac947981fc 100644
--- a/addons/analytic_user_function/analytic_user_function.py
+++ b/addons/analytic_user_function/analytic_user_function.py
@@ -65,7 +65,7 @@ class hr_analytic_timesheet(osv.osv):
                 return False
 
 
-    def on_change_account_id(self, cr, uid, ids, account_id, user_id=False, unit_amount=0):
+    def on_change_account_id(self, cr, uid, ids, account_id, user_id, unit_amount=0):
         res = {}
         if not (account_id):
             #avoid a useless call to super
diff --git a/addons/hr_timesheet_invoice/hr_timesheet_invoice_view.xml b/addons/hr_timesheet_invoice/hr_timesheet_invoice_view.xml
index b752ade8da0..95fa39a6eda 100644
--- a/addons/hr_timesheet_invoice/hr_timesheet_invoice_view.xml
+++ b/addons/hr_timesheet_invoice/hr_timesheet_invoice_view.xml
@@ -50,7 +50,7 @@
             <field name="inherit_id" ref="hr_timesheet.hr_timesheet_line_form"/>
             <field name="arch" type="xml">
                 <field name="account_id" position="replace">
-                    <field domain="[('type','in',['normal','contract']),('state', '&lt;&gt;', 'close'),('use_timesheets','=',1)]" name="account_id" on_change="on_change_account_id(account_id)" context="{'default_use_timesheets': 1}"/>
+                    <field domain="[('type','in',['normal','contract']),('state', '&lt;&gt;', 'close'),('use_timesheets','=',1)]" name="account_id" on_change="on_change_account_id(account_id, user_id)" context="{'default_use_timesheets': 1}"/>
                 </field>
             </field>
         </record>
@@ -72,7 +72,7 @@
             <field name="inherit_id" ref="hr_timesheet.hr_timesheet_line_tree"/>
             <field name="arch" type="xml">
                 <field name="account_id" position="replace">
-                    <field domain="[('type','in',['normal','contract']),('state', '&lt;&gt;', 'close'),('use_timesheets','=',1)]" name="account_id" on_change="on_change_account_id(account_id)" context="{'default_use_timesheets': 1}"/>
+                    <field domain="[('type','in',['normal','contract']),('state', '&lt;&gt;', 'close'),('use_timesheets','=',1)]" name="account_id" on_change="on_change_account_id(account_id, user_id)" context="{'default_use_timesheets': 1}"/>
                 </field>
             </field>
         </record>