diff --git a/addons/project/views/project_views.xml b/addons/project/views/project_views.xml
index a202998e942..9ebcef69138 100644
--- a/addons/project/views/project_views.xml
+++ b/addons/project/views/project_views.xml
@@ -53,6 +53,8 @@
                         <filter string="Assigned to" name="User" context="{'group_by':'user_id'}"/>
                         <filter string="Stage" name="Stage" context="{'group_by':'stage_id'}"/>
                         <filter string="Company" context="{'group_by':'company_id'}" groups="base.group_multi_company"/>
+                        <separator/>
+                        <filter string="Last Message" name="group_message_last_post" context="{'group_by':'message_last_post:week'}" invisible="1"/>
                     </group>
                 </search>
             </field>