# next/image Un-configured Host
#### Why This Error Occurred
On one of your pages that leverages the `next/image` component, you passed a `src` value that uses a hostname in the URL that isn't defined in the `images.domains` config in `next.config.js`.
#### Possible Ways to Fix It
Add the hostname of your URL to the `images.domains` config in `next.config.js`:
```js
// next.config.js
module.exports = {
images: {
domains: ['assets.example.com'],
},
}
```
### Useful Links
- [Image Optimization Documentation](https://nextjs.org/docs/basic-features/image-optimization)
