diff --git a/Program.cs b/Program.cs
index 05d4308..dafd6b7 100644
--- a/Program.cs
+++ b/Program.cs
@@ -88,6 +88,8 @@ public class CropTool : ITool {
 
   public CropTool(Photo photo) {
     activePhoto = photo;
+    mouseDragStart = new(photo.CropRectangle.Left, photo.CropRectangle.Top);
+    mouseDragEnd = new(photo.CropRectangle.Right, photo.CropRectangle.Bottom);
   }
 
   public ToolState HandleInput(UiGeometry geometry, KeyboardState input, MouseState mouse, Game game) {