diff --git a/apps/system/js/app_transition_controller.js b/apps/system/js/app_transition_controller.js
index ca982b88cd81..b5c4c23b3dc3 100644
--- a/apps/system/js/app_transition_controller.js
+++ b/apps/system/js/app_transition_controller.js
@@ -287,7 +287,7 @@
       var classes = ['enlarge', 'reduce', 'to-cardview', 'from-cardview',
         'invoking', 'invoked', 'zoom-in', 'zoom-out', 'fade-in', 'fade-out',
         'transition-opening', 'transition-closing', 'immediate',
-        'slideup', 'slidedown'];
+        'slideup', 'slidedown', 'in-from-left', 'out-to-right'];
 
       classes.forEach(function iterator(cls) {
         this.app.element.classList.remove(cls);