diff --git a/mail_activity_board/views/mail_activity_view.xml b/mail_activity_board/views/mail_activity_view.xml
index 9b9429ae46..98f64a8d10 100644
--- a/mail_activity_board/views/mail_activity_view.xml
+++ b/mail_activity_board/views/mail_activity_view.xml
@@ -58,7 +58,10 @@
                         nolabel="1"
                     >
                         <field name="res_name" invisible="1" />
-                        <h1><field name="related_model_instance" /></h1>
+                        <h1><field
+                                name="related_model_instance"
+                                options="{'no_open': True}"
+                            /></h1>
                     </button>
                     <field name="activity_category" invisible="1" />
                     <field name="res_model" invisible="1" />