diff --git a/modules/graphics_utils.js b/modules/graphics_utils.js
index 5c08188bc..f573cf0cf 100644
--- a/modules/graphics_utils.js
+++ b/modules/graphics_utils.js
@@ -1,6 +1,6 @@
 // draw an arc between radii minR and maxR, and between angles minAngle and maxAngle centered at X,Y. All angles are radians.
 exports.fillArc = function(graphics, X, Y, minR, maxR, minAngle, maxAngle, stepAngle) {
-  var step = stepAngle || 0.2;
+  var step = stepAngle || 0.21;
   var angle = minAngle;
   var inside = [];
   var outside = [];
@@ -31,5 +31,5 @@ exports.degreesToRadians = function(degrees){
 }
 
 exports.radiansToDegrees = function(radians){
-  return 180/Math.PI * degrees;
+  return 180/Math.PI * radians;
 }
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