diff --git a/src/shape_trapezium.scad b/src/shape_trapezium.scad
index e9f1c0ec..f7a6424b 100644
--- a/src/shape_trapezium.scad
+++ b/src/shape_trapezium.scad
@@ -8,10 +8,7 @@
 *
 **/
 
-include <__comm__/__frags.scad>;
-include <__comm__/__pie_for_rounding.scad>;
-include <__comm__/__half_trapezium.scad>;
-include <__comm__/__trapezium.scad>;
+use <__comm__/__trapezium.scad>;
 
 function shape_trapezium(length, h, corner_r = 0) = 
     __trapezium(
diff --git a/test/test_shape_trapezium.scad b/test/test_shape_trapezium.scad
index a97ecb2d..c07f2e2d 100644
--- a/test/test_shape_trapezium.scad
+++ b/test/test_shape_trapezium.scad
@@ -1,5 +1,5 @@
-include <unittest.scad>;
-include <shape_trapezium.scad>;
+use <unittest.scad>;
+use <shape_trapezium.scad>;
 
 module test_shape_trapezium() {
     echo("==== test_shape_trapezium ====");