diff --git a/src/maze/mz_square_walls.scad b/src/maze/mz_square_walls.scad
index d309b308..c3fdb1bc 100644
--- a/src/maze/mz_square_walls.scad
+++ b/src/maze/mz_square_walls.scad
@@ -8,7 +8,6 @@
 *
 **/
 
-use <../util/dedup.scad>;
 use <_impl/_mz_square_walls_impl.scad>;
 
 function mz_square_walls(cells, rows, columns, cell_width, left_border = true, bottom_border = true) = 
@@ -19,7 +18,10 @@ function mz_square_walls(cells, rows, columns, cell_width, left_border = true, b
      concat(
         [
             for(cell = cells) 
-            let(pts = dedup(_square_walls(cell, cell_width)))
+            let(
+                wall_pts = _square_walls(cell, cell_width),
+                pts = len(wall_pts) == 4 ? [wall_pts[0], wall_pts[1], wall_pts[3]]: wall_pts
+            )
             if(pts != []) pts
         ]
         , left_walls, buttom_walls