diff --git a/README.md b/README.md
index 24085536..feb42574 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@ Every module or function is located in the file which has the same name as the m
 Some module files are organized in a directory. For example, px_circle.scad exists in `pixel` directory. You have to prefix the directory name when including `px_circle`.
 
     include <pixel/px_circle.scad>;
-	points = px_circle(center = [-0.5, -0.5], radius = 10);
+	points = px_circle(radius = 10);
 	for(pt = points) {
         translate(pt) square(1);
 	}