diff --git a/src/line2d.scad b/src/line2d.scad
index a20398a3..a71f3c9b 100644
--- a/src/line2d.scad
+++ b/src/line2d.scad
@@ -1,8 +1,7 @@
 /**
 * line2d.scad
 *
-* Creates a line from two points. When the end points are CAP_ROUND, 
-* you can use $fa, $fs or $fn to controll the circle module used internally.
+* Creates a line from two points.
 * 
 * @copyright Justin Lin, 2017
 * @license https://opensource.org/licenses/lgpl-3.0.html
diff --git a/src/polyline2d.scad b/src/polyline2d.scad
index 374fa7bf..317cc494 100644
--- a/src/polyline2d.scad
+++ b/src/polyline2d.scad
@@ -1,7 +1,9 @@
 /**
 * polyline2d.scad
 *
-* Creates a polyline from a list of x, y coordinates. It depends on the line2d module so you have to include line2d.scad.
+* Creates a polyline from a list of x, y coordinates. When the end points are CAP_ROUND, 
+* you can use $fa, $fs or $fn to controll the circle module used internally. 
+* It depends on the line2d module so you have to include line2d.scad.
 * 
 * @copyright Justin Lin, 2017
 * @license https://opensource.org/licenses/lgpl-3.0.html
@@ -10,7 +12,7 @@
 *
 **/
 
-module polyline2d(points, width, startingStyle = "CAP_SQUARE", endingStyle = "CAP_SQUARE", round_fn = 24) {
+module polyline2d(points, width, startingStyle = "CAP_SQUARE", endingStyle = "CAP_SQUARE") {
     module line_segment(index) {
         styles = index == 1 ? [startingStyle, "CAP_ROUND"] : (
             index == len(points) - 1 ? ["CAP_ROUND", endingStyle] : [
@@ -19,8 +21,7 @@ module polyline2d(points, width, startingStyle = "CAP_SQUARE", endingStyle = "CA
         );
         
         line2d(points[index - 1], points[index], width, 
-               p1Style = styles[0], p2Style = styles[1], 
-               round_fn = round_fn);
+               p1Style = styles[0], p2Style = styles[1]);
     }
 
     module polyline2d_inner(points, index) {