diff --git a/ash/multi_device_setup/multi_device_notification_presenter.cc b/ash/multi_device_setup/multi_device_notification_presenter.cc
index 69e3cf3366498..4319bc2134792 100644
--- a/ash/multi_device_setup/multi_device_notification_presenter.cc
+++ b/ash/multi_device_setup/multi_device_notification_presenter.cc
@@ -234,7 +234,7 @@ void MultiDeviceNotificationPresenter::OnNotificationClicked(
     case Status::kExistingUserHostSwitchedNotificationVisible:
       // Clicks on the 'host switched' and 'Chromebook added' notifications have
       // the same effect, i.e. opening the Settings subpage.
-      FALLTHROUGH;
+      [[fallthrough]];
     case Status::kExistingUserNewChromebookNotificationVisible:
       Shell::Get()
           ->system_tray_model()
diff --git a/ash/rotator/screen_rotation_animator.cc b/ash/rotator/screen_rotation_animator.cc
index a0f67569f02a8..53dbf20fa9487 100644
--- a/ash/rotator/screen_rotation_animator.cc
+++ b/ash/rotator/screen_rotation_animator.cc
@@ -492,7 +492,7 @@ void ScreenRotationAnimator::Rotate(
   switch (screen_rotation_state_) {
     case IDLE:
       DCHECK(!current_async_rotation_request_);
-      FALLTHROUGH;
+      [[fallthrough]];
     case COPY_REQUESTED:
       if (current_async_rotation_request_ &&
           !RootWindowChangedForDisplayId(