diff --git a/009-Extrusion/box.scad b/009-Extrusion/box.scad
index 59439e6..c6e8617 100644
--- a/009-Extrusion/box.scad
+++ b/009-Extrusion/box.scad
@@ -19,8 +19,8 @@ module box(l, w, h, r, thickness) {
         rounded_rectangle(l, w, r);
     scale([1,1,-1])
       translate([0,0,-thickness])
-      linear_extrude(height=h)
-        rounded_rectangle(l-thickness*2, w-thickness*2, r);
+        linear_extrude(height=h)
+          rounded_rectangle(l-thickness*2, w-thickness*2, r);
   }
 }