diff --git a/addons/sale_timesheet/views/project_task_views.xml b/addons/sale_timesheet/views/project_task_views.xml
index ab3df3440bd..5a229f23726 100644
--- a/addons/sale_timesheet/views/project_task_views.xml
+++ b/addons/sale_timesheet/views/project_task_views.xml
@@ -7,7 +7,7 @@
         <field name="inherit_id" ref="project.edit_project"/>
         <field name="arch" type="xml">
             <xpath expr="//header" position="inside">
-                <button name="action_make_billable" string="Create Sales Order" type="object" attrs="{'invisible': [('billable_type', '!=', 'no')]}"/>
+                <button name="action_make_billable" string="Create Sales Order" type="object" attrs="{'invisible': [('billable_type', '!=', 'no')]}" group="sale.group_sale_salesman"/>
             </xpath>
             <xpath expr="//page[@name='emails']" position="after">
                 <page name="billing_employee_rate" string="Invoicing" attrs="{'invisible': [('billable_type', '=', 'no')]}">