diff --git a/addons/hr_timesheet/views/res_config_settings_views.xml b/addons/hr_timesheet/views/res_config_settings_views.xml
index 4be15949746..09c4fdcb2c6 100644
--- a/addons/hr_timesheet/views/res_config_settings_views.xml
+++ b/addons/hr_timesheet/views/res_config_settings_views.xml
@@ -35,7 +35,7 @@
                                 </div>
                                 <div class="content-group">
                                     <div class="mt16">
-                                        <field name="timesheet_encode_uom_id" options="{'no_create': True}"/>
+                                        <field name="timesheet_encode_uom_id" options="{'no_create': True}" required="1"/>
                                     </div>
                                 </div>
                             </div>