ReferenceError: h is not defined

[yi-ge]

I use @storybook/cli@4.0.0-alpha.3.

const styles = {
  textAlign: 'center',
};

let CenterDecorator = (storyFn) => (
  <div style={styles}>
    { storyFn() }
  </div>
)

storiesOf('Button', module)
  .addDecorator(CenterDecorator)
  .add('with text', () => ({
    components: { MyButton },
    template: '<my-button @click="action">Hello Button</my-button>',
    methods: { action: action('clicked') },
  }))
  .add('with JSX', () => ({
    components: { MyButton },
    render(h) {
      return <my-button onClick={this.action}>With JSX</my-button>;
    },
    methods: { action: linkTo('clicked') },
  }))

I get the error: ReferenceError: h is not defined.

If add h in render, it work. #3409

But on the addDecorator, I cant get the h.