diff --git a/creational/builder.md b/creational/builder.md
index e19179e..9ba2641 100644
--- a/creational/builder.md
+++ b/creational/builder.md
@@ -53,9 +53,9 @@ type Interface interface {
 ```go
 assembly := car.NewBuilder().Paint(car.RedColor)
 
-familyCar := assembly.Wheels(car.SportsWheels).TopSpeed(50 * car.MPH).Build()
+familyCar := assembly.Wheels(car.SteelWheels).TopSpeed(50 * car.MPH).Build()
 familyCar.Drive()
 
-sportsCar := assembly.Wheels(car.SteelWheels).TopSpeed(150 * car.MPH).Build()
+sportsCar := assembly.Wheels(car.SportsWheels).TopSpeed(150 * car.MPH).Build()
 sportsCar.Drive()
 ```