diff --git a/examples/klein_bottle.scad b/examples/klein_bottle.scad
index b4d32cbb..6a003fe4 100644
--- a/examples/klein_bottle.scad
+++ b/examples/klein_bottle.scad
@@ -1,11 +1,9 @@
-include <polysections.scad>;
-include <arc_path.scad>;
-include <circle_path.scad>;
-include <path_extrude.scad>;
-include <bezier_curve.scad>;
-include <hull_polyline2d.scad>;
-include <rotate_p.scad>;
-include <bspline_curve.scad>;
+use <arc_path.scad>;
+use <circle_path.scad>;
+use <path_extrude.scad>;
+use <bezier_curve.scad>;
+use <hull_polyline2d.scad>;
+use <bspline_curve.scad>;
 
 radius1 = 10;
 radius2 = 20;