diff --git a/app/src/main/java/com/android/developers/androidify/navigation/NavigationRoutes.kt b/app/src/main/java/com/android/developers/androidify/navigation/NavigationRoutes.kt
index 0025a7fc..81c8338f 100644
--- a/app/src/main/java/com/android/developers/androidify/navigation/NavigationRoutes.kt
+++ b/app/src/main/java/com/android/developers/androidify/navigation/NavigationRoutes.kt
@@ -20,7 +20,7 @@ package com.android.developers.androidify.navigation
 import kotlinx.serialization.ExperimentalSerializationApi
 import kotlinx.serialization.Serializable
 
-interface NavigationRoute
+sealed interface NavigationRoute
 
 @Serializable
 data object Home : NavigationRoute