diff --git a/app/src/main/java/com/google/android/samples/socialite/repository/NotificationHelper.kt b/app/src/main/java/com/google/android/samples/socialite/repository/NotificationHelper.kt
index a5d7bb68..01b443e1 100644
--- a/app/src/main/java/com/google/android/samples/socialite/repository/NotificationHelper.kt
+++ b/app/src/main/java/com/google/android/samples/socialite/repository/NotificationHelper.kt
@@ -267,6 +267,10 @@ class NotificationHelper @Inject constructor(@ApplicationContext context: Contex
             // notification.
             .setStyle(messagingStyle)
             .setWhen(messages.last().timestamp)
+            // Compat older APIs without notification channels for ensuring
+            // message notifications can show on the top of home screen.
+            .setPriority(NotificationCompat.PRIORITY_HIGH)
+            .setDefaults(Notification.DEFAULT_ALL)
         // Don't sound/vibrate if an update to an existing notification.
         if (update) {
             builder.setOnlyAlertOnce(true)