diff --git a/vitamins/washer.scad b/vitamins/washer.scad
index e5c9138..cf2d316 100644
--- a/vitamins/washer.scad
+++ b/vitamins/washer.scad
@@ -23,7 +23,7 @@
 //! If a washer is given a child, usually a screw or a nut, then it is placed on its top surface.
 //
 include <../utils/core/core.scad>
-include <../utils/sweep.scad>
+use <../utils/sweep.scad>
 
 soft_washer_colour = grey(20);
 hard_washer_colour = grey(85);