diff --git a/go.md b/go.md
index 89010fc3d..6739d3435 100644
--- a/go.md
+++ b/go.md
@@ -506,7 +506,7 @@ See: [Methods](https://tour.golang.org/methods/1)
 ```go
 func (v *Vertex) Scale(f float64) {
   v.X = v.X * f
-  v.y = v.Y * f
+  v.Y = v.Y * f
 }
 ```
 {: data-line="1"}