diff --git a/Editor/ScreenEditor.cs b/Editor/ScreenEditor.cs
index 3099519..e333241 100644
--- a/Editor/ScreenEditor.cs
+++ b/Editor/ScreenEditor.cs
@@ -51,6 +51,8 @@ static void DrawNavigator(Navigator navigator, Rect rect) {
 		}
 
 		static void DrawScreen(VioletScreen screen, Rect rect) {
+			// prefab mode
+			if (screen.transform.parent == null) { return; }
 			var navigator = screen.transform.parent.GetComponent<Navigator>();
 			if (navigator == null) {
 				Violet.LogWarning($"Unable to find Navigator for {screen.name} - make sure {screen.transform.parent.name} has a Navigator component");