diff --git a/src/experimental/hollow_out_sweep.scad b/src/experimental/hollow_out_sweep.scad
index 845b2043..28b8871f 100644
--- a/src/experimental/hollow_out_sweep.scad
+++ b/src/experimental/hollow_out_sweep.scad
@@ -1,6 +1,6 @@
 use <util/rand.scad>;
 use <line3d.scad>;
-use <hull_polyline3d.scad>;
+use <polyline_join.scad>;
 use <experimental/tri_bisectors.scad>;
 
 // style: LINES or HULL_LINES
@@ -49,7 +49,8 @@ module hollow_out_sweep(sections, diameter, closed = false, style = "LINES") {
     }   
     else if(style == "HULL_LINES") { 
         for(line = lines) {
-            hull_polyline3d(line, diameter = diameter);
+            polyline_join(line)
+                sphere(d = diameter);
         }
     }
 }
\ No newline at end of file
diff --git a/src/hull_polyline3d.scad b/src/hull_polyline3d.scad
index 7068b448..1e2e7673 100644
--- a/src/hull_polyline3d.scad
+++ b/src/hull_polyline3d.scad
@@ -9,7 +9,7 @@
 **/
 
 module hull_polyline3d(points, diameter = 1) {
-    echo("`hull_polyline2d` is deprecated since 3.2. Use `polyline_join` instead.");
+    echo("`hull_polyline3d` is deprecated since 3.2. Use `polyline_join` instead.");
     
     radius = diameter / 2;
     leng = len(points);