diff --git a/react.md b/react.md
index 994918b15..7eb538ff6 100644
--- a/react.md
+++ b/react.md
@@ -69,6 +69,13 @@ See: [Properties](https://reactjs.org/docs/tutorial.html#using-props)
 
 ### States
 
+```jsx
+constructor(props) {
+  super(props)
+  this.state = {}
+}
+```
+
 ```jsx
 this.setState({ username: 'rstacruz' })
 ```