diff --git a/src/circle_path.scad b/src/circle_path.scad
index 0f6f0565..7e031b9b 100644
--- a/src/circle_path.scad
+++ b/src/circle_path.scad
@@ -16,7 +16,7 @@ function circle_path(radius) =
     let(
         _frags = $fn > 0 ? 
             ($fn >= 3 ? $fn : 3) : 
-            max(min(360 / $fa, radius * 2 * 3.14159 / $fs), 5),
+            max(min(360 / $fa, radius * 6.28318 / $fs), 5),
         step_a = 360 / _frags
     )
     [
diff --git a/src/circular_sector.scad b/src/circular_sector.scad
index ab92c0c0..5ac45b27 100644
--- a/src/circular_sector.scad
+++ b/src/circular_sector.scad
@@ -14,7 +14,7 @@
 module circular_sector(radius, angles) {
     frags = $fn > 0 ? 
         ($fn >= 3 ? $fn : 3) : 
-        max(min(360 / $fa, radius * 2 * 3.14159 / $fs), 5)
+        max(min(360 / $fa, radius * 6.28318 / $fs), 5)
     ;
     
     r = radius / cos(180 / frags);
diff --git a/src/ellipse.scad b/src/ellipse.scad
index 4a26ef21..1f43774e 100644
--- a/src/ellipse.scad
+++ b/src/ellipse.scad
@@ -14,7 +14,7 @@
 module ellipse(axes) {
     frags = $fn > 0 ? 
         ($fn >= 3 ? $fn : 3) : 
-        max(min(360 / $fa, axes[0] * 2 * 3.14159 / $fs), 5);    
+        max(min(360 / $fa, axes[0] * 6.28318 / $fs), 5);    
     
     step_a = 360 / frags;
     polygon(
diff --git a/src/line2d.scad b/src/line2d.scad
index c30e23d9..b90433ff 100644
--- a/src/line2d.scad
+++ b/src/line2d.scad
@@ -29,7 +29,7 @@ module line2d(p1, p2, width, p1Style = "CAP_SQUARE", p2Style =  "CAP_SQUARE") {
     
     frags = $fn > 0 ? 
         ($fn >= 3 ? $fn : 3) : 
-        max(min(360 / $fa, half_width * 2 * 3.14159 / $fs), 5);    
+        max(min(360 / $fa, half_width * 6.28318 / $fs), 5);    
         
     remain = frags % 4;
     end_frags = (remain / 4) > 0.5 ? frags - remain + 4 : frags - remain;
diff --git a/src/line3d.scad b/src/line3d.scad
index adbabce0..156899b8 100644
--- a/src/line3d.scad
+++ b/src/line3d.scad
@@ -15,7 +15,7 @@ module line3d(p1, p2, thickness, p1Style = "CAP_CIRCLE", p2Style = "CAP_CIRCLE")
 
     frags = $fn > 0 ? 
         ($fn >= 3 ? $fn : 3) : 
-        max(min(360 / $fa, r * 2 * 3.14159 / $fs), 5)
+        max(min(360 / $fa, r * 6.28318 / $fs), 5)
     ;
     
     dx = p2[0] - p1[0];
diff --git a/src/rounded_square.scad b/src/rounded_square.scad
index 5c0ca1c5..830cba8c 100644
--- a/src/rounded_square.scad
+++ b/src/rounded_square.scad
@@ -14,7 +14,7 @@
 module rounded_square(size, corner_r, center = false) {
     frags = $fn > 0 ? 
         ($fn >= 3 ? $fn : 3) : 
-        max(min(360 / $fa, corner_r * 2 * 3.14159 / $fs), 5);
+        max(min(360 / $fa, corner_r * 6.28318 / $fs), 5);
 
     remain = frags % 4;
     corner_frags = (remain / 4) > 0.5 ? frags - remain + 4 : frags - remain;