1 files changed, 1 insertions, 1 deletions
diff --git a/addons/mail/static/src/js/thread_windows/abstract_thread_window.js b/addons/mail/static/src/js/thread_windows/abstract_thread_window.js
index 300bfb11a3e..ff5acfea0d2 100644
--- a/addons/mail/static/src/js/thread_windows/abstract_thread_window.js
+++ b/addons/mail/static/src/js/thread_windows/abstract_thread_window.js
@@ -95,7 +95,7 @@ var AbstractThreadWindow = Widget.extend({
         var def = this._threadWidget.replace(this.$('.o_thread_window_content')).then(function () {
             self._threadWidget.$el.on('scroll', self, self._debouncedOnScroll);
         });
-        return $.when(this._super(), def);
+        return Promise.all([this._super(), def]);
     },
     /**
      * @override