diff --git a/addons/sale_timesheet/views/project_task_views.xml b/addons/sale_timesheet/views/project_task_views.xml
index 32325e63daf..98bc0ae1883 100644
--- a/addons/sale_timesheet/views/project_task_views.xml
+++ b/addons/sale_timesheet/views/project_task_views.xml
@@ -123,13 +123,13 @@
                 <xpath expr="//field[@name='timesheet_ids']/tree/field[@name='unit_amount']" position="before">
                     <!-- <field name="timesheet_ids"/> is already inside a block groups="hr_timesheet.group_hr_timesheet_user"  -->
                     <field name="timesheet_invoice_id" column_invisible="True"/>
-                    <field name="so_line" groups="!sales_team.group_sale_salesman"
+                    <field name="so_line" widget="so_line_field" groups="!sales_team.group_sale_salesman"
                         column_invisible="not parent.allow_billable"
                         readonly="readonly_timesheet"
                         context="{'with_remaining_hours': True, 'with_price_unit': True}" options="{'no_create': True, 'no_open': True}"
                         domain="[('is_service', '=', True), ('order_partner_id', 'child_of', parent.partner_id), ('is_expense', '=', False), ('state', '=', 'sale')]"
                         optional="hide"/>
-                    <field name="so_line" groups="sales_team.group_sale_salesman"
+                    <field name="so_line" widget="so_line_field" groups="sales_team.group_sale_salesman"
                         column_invisible="not parent.allow_billable"
                         readonly="readonly_timesheet"
                         context="{'with_remaining_hours': True, 'with_price_unit': True}" options="{'no_create': True, 'no_open': True}"