diff --git a/addons/mail/static/src/models/messaging/messaging.js b/addons/mail/static/src/models/messaging/messaging.js
index 6f9caca64d1..b3e66f63b48 100644
--- a/addons/mail/static/src/models/messaging/messaging.js
+++ b/addons/mail/static/src/models/messaging/messaging.js
@@ -12,7 +12,9 @@ function factory(dependencies) {
          * @override
          */
         _willDelete() {
-            this.env.services['bus_service'].off('window_focus', null, this._handleGlobalWindowFocus);
+            if (this.env.services['bus_service']) {
+                this.env.services['bus_service'].off('window_focus', null, this._handleGlobalWindowFocus);
+            }
             return super._willDelete(...arguments);
         }
 
diff --git a/addons/mail/static/src/models/messaging_notification_handler/messaging_notification_handler.js b/addons/mail/static/src/models/messaging_notification_handler/messaging_notification_handler.js
index 4ab9cfc98c3..dcd8b09f688 100644
--- a/addons/mail/static/src/models/messaging_notification_handler/messaging_notification_handler.js
+++ b/addons/mail/static/src/models/messaging_notification_handler/messaging_notification_handler.js
@@ -16,8 +16,10 @@ function factory(dependencies) {
          * @override
          */
         _willDelete() {
-            this.env.services['bus_service'].off('notification');
-            this.env.services['bus_service'].stopPolling();
+            if (this.env.services['bus_service']) {
+                this.env.services['bus_service'].off('notification');
+                this.env.services['bus_service'].stopPolling();
+            }
             return super._willDelete(...arguments);
         }