diff --git a/addons/sale_timesheet/views/project_task_views.xml b/addons/sale_timesheet/views/project_task_views.xml
index 6b3d9b4c128..ab3df3440bd 100644
--- a/addons/sale_timesheet/views/project_task_views.xml
+++ b/addons/sale_timesheet/views/project_task_views.xml
@@ -100,7 +100,7 @@
                 </xpath>
                 <xpath expr="//field[@name='timesheet_ids']/tree" position="inside">
                     <field name="timesheet_invoice_id" invisible="1"/>
-                    <field name="so_line" readonly="1" attrs="{'column_invisible': ['&amp;', ('parent.is_project_map_empty', '=', True), ('parent.sale_line_id', '!=', False)]}"/>
+                    <field name="so_line" readonly="1" attrs="{'column_invisible': ['|', ('parent.is_project_map_empty', '=', True), ('parent.billable_type', '!=', 'employee_rate')]}"/>
                 </xpath>
             </field>
         </record>