diff --git a/modules/graphics_utils.js b/modules/graphics_utils.js
index ca2c0fb76..f573cf0cf 100644
--- a/modules/graphics_utils.js
+++ b/modules/graphics_utils.js
@@ -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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