diff --git a/pages/130-The-Widget-Tree.md b/pages/130-The-Widget-Tree.md
index 85ac5a3..b488f06 100644
--- a/pages/130-The-Widget-Tree.md
+++ b/pages/130-The-Widget-Tree.md
@@ -132,7 +132,7 @@ class MyWidget extends StatelessWidget {
   ///Called first
   ///
   ///Use for initialization if needed
-  MyClass({ Key key }) : super(key: key);
+  MyWidget({ Key key }) : super(key: key);
 
   ///Called multiple times a second
   ///