How can I export a stateless pure dumb component?

If I use class this works:

```
import React, { Component } from 'react';

export default class Header extends Component {
    render(){
        return <pre>Header</pre>
    }
}

```

However if I use a pure function I cannot get it to work.

```
import React, { Component } from 'react';
export default const Header = () => {
    return <pre>Header</pre>
}

```

Am I missing something basic?