diff --git a/addons/account_analytic_plans/account_analytic_plans.py b/addons/account_analytic_plans/account_analytic_plans.py
index 69bd3790013..9bd60283136 100644
--- a/addons/account_analytic_plans/account_analytic_plans.py
+++ b/addons/account_analytic_plans/account_analytic_plans.py
@@ -259,7 +259,7 @@ class account_invoice_line(osv.osv):
         return res
 
     def product_id_change(self, cr, uid, ids, product, uom, qty=0, name='', type='out_invoice', partner_id=False, fposition_id=False, price_unit=False, address_invoice_id=False, context={}):
-        res_prod = super(account_invoice_line,self).product_id_change(cr, uid, ids, product, uom, qty, name, type, partner_id, fposition, price_unit, address_invoice_id, context)
+        res_prod = super(account_invoice_line,self).product_id_change(cr, uid, ids, product, uom, qty, name, type, partner_id, fposition_id, price_unit, address_invoice_id, context)
         rec = self.pool.get('account.analytic.default').account_get(cr, uid, product, partner_id, uid, time.strftime('%Y-%m-%d'), context)
         if rec and rec.analytics_id:
             res_prod['value'].update({'analytics_id':rec.analytics_id.id})