diff --git a/painting/circle.js b/painting/circle.js
index 85ff14d..09f9ff8 100644
--- a/painting/circle.js
+++ b/painting/circle.js
@@ -13,7 +13,7 @@ class Circle extends Shape {
     static randomOptions() {
         let opts = super.randomOptions();
 
-        opts.r = Math.floor(Math.random() * (this.maxY / 2 - opts.x));
+        opts.r = Math.floor(Math.random() * (this.maxY / 2));
 
         return opts;
     }