diff --git a/reference/RectTracker/main.cpp b/reference/RectTracker/main.cpp
index 5da055dff..479a9240a 100644
--- a/reference/RectTracker/main.cpp
+++ b/reference/RectTracker/main.cpp
@@ -60,6 +60,7 @@ struct MyApp : TopWindow {
 		rect = RectC(100, 100, 100, 100);
 		hline = 150;
 		vline = 150;
+		Sizeable().Zoomable();
 	}
 };