diff --git a/errors/middleware-upgrade-guide.md b/errors/middleware-upgrade-guide.md
index 02902b249d39..c461103f616f 100644
--- a/errors/middleware-upgrade-guide.md
+++ b/errors/middleware-upgrade-guide.md
@@ -171,6 +171,7 @@ As well as other extended methods from `Map`.
 #### Before
 
 ```javascript
+// pages/_middleware.ts
 import { NextResponse } from 'next/server'
 import type { NextRequest } from 'next/server'
 
@@ -246,7 +247,7 @@ The helper is imported from `next/server` and allows you to opt in to using the
 #### Before
 
 ```typescript
-// middleware.ts
+// pages/_middleware.ts
 import { NextRequest, NextResponse } from 'next/server'
 
 export function middleware(request: NextRequest) {
@@ -291,7 +292,7 @@ Use [`URLPattern`](https://developer.mozilla.org/en-US/docs/Web/API/URLPattern)
 #### Before
 
 ```typescript
-// middleware.ts
+// pages/_middleware.ts
 import { NextResponse } from 'next/server'
 import type { NextRequest } from 'next/server'