diff --git a/hr_course/models/hr_course.py b/hr_course/models/hr_course.py
index 8e0abb3acbd..94d7b99e267 100644
--- a/hr_course/models/hr_course.py
+++ b/hr_course/models/hr_course.py
@@ -8,7 +8,7 @@
 class HrCourse(models.Model):
     _name = "hr.course"
     _description = "Course"
-    _inherit = "mail.thread"
+    _inherit = ["mail.thread", "mail.activity.mixin"]
 
     name = fields.Char(string="Name", required=True, tracking=True)
     category_id = fields.Many2one(
diff --git a/hr_course/models/hr_course_schedule.py b/hr_course/models/hr_course_schedule.py
index d09cf363e81..efcd5fee746 100644
--- a/hr_course/models/hr_course_schedule.py
+++ b/hr_course/models/hr_course_schedule.py
@@ -12,7 +12,7 @@
 class HrCourseSchedule(models.Model):
     _name = "hr.course.schedule"
     _description = "Course Schedule"
-    _inherit = "mail.thread"
+    _inherit = ["mail.thread", "mail.activity.mixin"]
 
     name = fields.Char(string="Name", required=True, tracking=True)
     course_id = fields.Many2one("hr.course", string="Course", required=True)
diff --git a/hr_course/views/hr_course_schedule_views.xml b/hr_course/views/hr_course_schedule_views.xml
index c1105d1b854..bf8ab4ee536 100644
--- a/hr_course/views/hr_course_schedule_views.xml
+++ b/hr_course/views/hr_course_schedule_views.xml
@@ -140,11 +140,8 @@
                     </notebook>
                 </sheet>
                 <div class="oe_chatter">
-                    <field
-                        name="message_follower_ids"
-                        widget="mail_followers"
-                        groups="base.group_user"
-                    />
+                    <field name="message_follower_ids" widget="mail_followers" />
+                    <field name="activity_ids" widget="mail_activity" />
                     <field name="message_ids" widget="mail_thread" />
                 </div>
             </form>
diff --git a/hr_course/views/hr_course_views.xml b/hr_course/views/hr_course_views.xml
index 507f638ff33..e93b86afaa9 100644
--- a/hr_course/views/hr_course_views.xml
+++ b/hr_course/views/hr_course_views.xml
@@ -55,6 +55,11 @@
                         </page>
                     </notebook>
                 </sheet>
+                <div class="oe_chatter">
+                    <field name="message_follower_ids" widget="mail_followers" />
+                    <field name="activity_ids" widget="mail_activity" />
+                    <field name="message_ids" widget="mail_thread" />
+                </div>
             </form>
         </field>
     </record>