diff --git a/addons/hr_contract/models/hr_contract.py b/addons/hr_contract/models/hr_contract.py
index f3095184f95..ac6f8722290 100644
--- a/addons/hr_contract/models/hr_contract.py
+++ b/addons/hr_contract/models/hr_contract.py
@@ -51,7 +51,7 @@ class Contract(models.Model):
 
     _name = 'hr.contract'
     _description = 'Contract'
-    _inherit = ['mail.thread']
+    _inherit = ['mail.thread', 'mail.activity.mixin']
 
     name = fields.Char('Contract Reference', required=True)
     employee_id = fields.Many2one('hr.employee', string='Employee')
diff --git a/addons/hr_contract/views/hr_contract_views.xml b/addons/hr_contract/views/hr_contract_views.xml
index 7b7916ee4be..2327151fcfc 100644
--- a/addons/hr_contract/views/hr_contract_views.xml
+++ b/addons/hr_contract/views/hr_contract_views.xml
@@ -137,6 +137,7 @@
                     </sheet>
                     <div class="oe_chatter">
                         <field name="message_follower_ids" widget="mail_followers" groups="base.group_user"/>
+                        <field name="activity_ids" widget="mail_activity"/>
                         <field name="message_ids" widget="mail_thread"/>
                     </div>
                 </form>