diff --git a/addons/hr_timesheet_invoice/wizard/hr_timesheet_final_invoice_create.py b/addons/hr_timesheet_invoice/wizard/hr_timesheet_final_invoice_create.py
index 66975695814..0e056b81e61 100644
--- a/addons/hr_timesheet_invoice/wizard/hr_timesheet_final_invoice_create.py
+++ b/addons/hr_timesheet_invoice/wizard/hr_timesheet_final_invoice_create.py
@@ -126,6 +126,8 @@ class final_invoice_create(osv.osv_memory):
                     taxes = []
 
                 tax = fiscal_pos_obj.map_tax(cr, uid, account.partner_id.property_account_position, taxes)
+                if not account_id:
+                    raise osv.except_osv(_("Configuration Error"), _("No income account defined for product '%s'") % product.name)
                 curr_line = {
                     'price_unit': -amount,
                     'quantity': 1.0,
@@ -146,6 +148,8 @@ class final_invoice_create(osv.osv_memory):
             taxes = product.taxes_id
             tax = fiscal_pos_obj.map_tax(cr, uid, account.partner_id.property_account_position, taxes)
             account_id = product.product_tmpl_id.property_account_income.id or product.categ_id.property_account_income_categ.id
+            if not account_id:
+                raise osv.except_osv(_("Configuration Error"), _("No income account defined for product '%s'") % product.name)
             curr_line = {
                 'price_unit': account.amount_max - amount_total,
                 'quantity': 1.0,
diff --git a/addons/hr_timesheet_invoice/wizard/hr_timesheet_invoice_create.py b/addons/hr_timesheet_invoice/wizard/hr_timesheet_invoice_create.py
index 4372a19a89a..502d35ff2d1 100644
--- a/addons/hr_timesheet_invoice/wizard/hr_timesheet_invoice_create.py
+++ b/addons/hr_timesheet_invoice/wizard/hr_timesheet_invoice_create.py
@@ -155,6 +155,8 @@ class hr_timesheet_invoice_create(osv.osv_memory):
                 taxes = product.taxes_id
                 tax = fiscal_pos_obj.map_tax(cr, uid, account.partner_id.property_account_position, taxes)
                 account_id = product.product_tmpl_id.property_account_income.id or product.categ_id.property_account_income_categ.id
+                if not account_id:
+                    raise osv.except_osv(_("Configuration Error"), _("No income account defined for product '%s'") % product.name)
                 curr_line = {
                     'price_unit': price,
                     'quantity': qty,