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next.js/errors/next-image-missing-loader-width.mdx
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---
title: 'Missing `width` in the URL Returned by the Loader Prop on `next/image`'
---
## Why This Error Occurred
The [`loader`](/docs/pages/api-reference/components/image#loader) prop on the `next/image` component allows you to override the built-in URL resolution with a custom implementation in order to support any 3rd party cloud provider that can perform Image Optimization.
This error occurred because the provided `loader()` function did not use `width` in the returned URL string. This means that the image will likely not be resized and therefore degrade performance.
## Possible Ways to Fix It
- Ensure your Image Optimization provider can resize images. Then use the `width` parameter from the [`loader()`](/docs/pages/api-reference/components/image#loader) function to construct the correct URL string.
- Add the [`unoptimized`](/docs/pages/api-reference/components/image#unoptimized) prop.
## Useful Links
- [Image Optimization Documentation](/docs/pages/api-reference/components/image)
- [`next/image` Documentation](/docs/pages/api-reference/components/image)