---
title: NotFound
summary: NotFound replies to the request with an HTTP 404 not found error.
url: https://www.fastly.com/documentation/reference/compute/sdks/go/compute-sdk-go/fsthttp/fn.NotFound/
---

**Kind:** Function  
**Module:** [fsthttp](https://www.fastly.com/documentation/reference/compute/sdks/go/compute-sdk-go/fsthttp/)  
**Package:** compute-sdk-go v1.11.0  
**Source:** https://github.com/fastly/compute-sdk-go/blob/d6bf71b04516ed72d6018cab6fff701a865f86e5/fsthttp/helpers.go#L21

```go
func NotFound(w ResponseWriter, r *Request)
```

NotFound replies to the request with an HTTP 404 not found error.

**Parameters**

- `w`: `ResponseWriter`
- `r`: `*Request`