diff --git a/src/maze/_impl/_mz_wang_tiles_impl.scad b/src/maze/_impl/_mz_wang_tiles_impl.scad
index 360c1db7..77b9bb83 100644
--- a/src/maze/_impl/_mz_wang_tiles_impl.scad
+++ b/src/maze/_impl/_mz_wang_tiles_impl.scad
@@ -1,6 +1,7 @@
-use <../../__comm__/_pt2_hash.scad>;
 use <../../util/set/hashset_has.scad>;
 
+include <../../__comm__/_pt2_hash.scad>;
+
 function _mz_wang_tiles_top(x, y) =
     let(
         nx = x * 2,
diff --git a/src/maze/mz_wang_tiles.scad b/src/maze/mz_wang_tiles.scad
index 7c456db7..d93e2d2c 100644
--- a/src/maze/mz_wang_tiles.scad
+++ b/src/maze/mz_wang_tiles.scad
@@ -8,11 +8,12 @@
 *
 **/
 
-use <../__comm__/_pt2_hash.scad>;
 use <_impl/_mz_wang_tiles_impl.scad>;
 use <mz_square_get.scad>;
 use <../util/set/hashset.scad>;
 
+include <../__comm__/_pt2_hash.scad>;
+
 function mz_wang_tiles(cells, left_border = true, bottom_border = true) =
     let(
         rows = len(cells),