diff --git a/src/experimental/tri_delaunay.scad b/src/experimental/tri_delaunay.scad
index a9495fb2..3aec89a7 100644
--- a/src/experimental/tri_delaunay.scad
+++ b/src/experimental/tri_delaunay.scad
@@ -1,5 +1,5 @@
 use <experimental/_impl/_tri_delaunay_impl.scad>;
-use <experimental/flat.scad>;
+use <util/flat.scad>;
 
 function tri_delaunay(points)=
    let(