diff --git a/addons/mail/static/src/components/notification_list/notification_list_item.scss b/addons/mail/static/src/components/notification_list/notification_list_item.scss
index 5910231e343..ad20b32f634 100644
--- a/addons/mail/static/src/components/notification_list/notification_list_item.scss
+++ b/addons/mail/static/src/components/notification_list/notification_list_item.scss
@@ -7,6 +7,7 @@ $o-mail-notification-list-item-muted-hover-background-color:
     darken($o-mail-notification-list-item-muted-background-color, 7%) !default;
 
 .o_NotificationListItem {
+    -webkit-user-select: none;
     user-select: none;
     background-color: $o-mail-notification-list-item-background-color;