diff --git a/src/doc/trpl/method-syntax.md b/src/doc/trpl/method-syntax.md
index ed4e9dd359b..861357ebbdc 100644
--- a/src/doc/trpl/method-syntax.md
+++ b/src/doc/trpl/method-syntax.md
@@ -188,7 +188,7 @@ struct CircleBuilder {
 
 impl CircleBuilder {
     fn new() -> CircleBuilder {
-        CircleBuilder { x: 0.0, y: 0.0, radius: 0.0, }
+        CircleBuilder { x: 0.0, y: 0.0, radius: 1.0, }
     }
 
     fn x(&mut self, coordinate: f64) -> &mut CircleBuilder {