diff --git a/src/path_extrude.scad b/src/path_extrude.scad
index 7e23a75b..d52ed55f 100644
--- a/src/path_extrude.scad
+++ b/src/path_extrude.scad
@@ -14,6 +14,9 @@
 **/
 
 module path_extrude(shape_pts, path_pts, triangles = "RADIAL", twist = 0, scale = 1.0) {
+    
+    s_pts = len(shape_pts[0]) == 3 ? shape_pts : [for(p = shape_pts) [p[0], p[1], 0]];
+
     function first_section() = 
         let(
             p1 = path_pts[0],
@@ -25,7 +28,7 @@ module path_extrude(shape_pts, path_pts, triangles = "RADIAL", twist = 0, scale
             az = atan2(dy, dx)
         )
         [
-            for(p = shape_pts) 
+            for(p = s_pts) 
                 rotate_p(p, [0, ay, az]) + p1
         ];
 
@@ -50,7 +53,7 @@ module path_extrude(shape_pts, path_pts, triangles = "RADIAL", twist = 0, scale
             az = atan2(dy, dx)
         )
         [
-            for(p = shape_pts) 
+            for(p = s_pts) 
                 let(scaled_p = [p[0] * (1 + scale_step_x * i), p[1] * (1 + scale_step_y * i), p[2]])
                 rotate_p(
                      rotate_p(scaled_p, twist_step * i) + [0, 0, length],