diff --git a/addons/sale_timesheet/wizard/sale_make_invoice_advance_views.xml b/addons/sale_timesheet/wizard/sale_make_invoice_advance_views.xml
index 676b618af38..0090accb3e1 100644
--- a/addons/sale_timesheet/wizard/sale_make_invoice_advance_views.xml
+++ b/addons/sale_timesheet/wizard/sale_make_invoice_advance_views.xml
@@ -11,7 +11,7 @@
             <xpath expr="//field[@name='deposit_taxes_id']" position="after">
                 <field name="invoicing_timesheet_enabled" invisible="1"/>
                 <label for="date_start_invoice_timesheet" string="Timesheets Period" attrs="{'invisible': [ '|', ('invoicing_timesheet_enabled', '=', False), ('advance_payment_method', '!=', 'delivered')]}"/>
-                <div clas="o_row" attrs="{'invisible': [ '|',('invoicing_timesheet_enabled', '=', False), ('advance_payment_method', '!=', 'delivered')]}">
+                <div class="o_row" attrs="{'invisible': [ '|',('invoicing_timesheet_enabled', '=', False), ('advance_payment_method', '!=', 'delivered')]}">
                     <field name="date_start_invoice_timesheet"
                         class="oe_inline" widget="daterange"
                         options="{'related_end_date': 'date_end_invoice_timesheet'}"