diff --git a/packages/next/src/server/web/spec-extension/adapters/headers.ts b/packages/next/src/server/web/spec-extension/adapters/headers.ts
index 87bcb3d7e4e2..88d2e6536370 100644
--- a/packages/next/src/server/web/spec-extension/adapters/headers.ts
+++ b/packages/next/src/server/web/spec-extension/adapters/headers.ts
@@ -18,12 +18,12 @@ export class ReadonlyHeadersError extends Error {
 }
 
 export type ReadonlyHeaders = Headers & {
-  /** @deprecated Method unavailable on `ReadonlyHeaders`. Read more: https://beta.nextjs.org/docs/api-reference/cookies */
-  append(...args: any[]): never
-  /** @deprecated Method unavailable on `ReadonlyHeaders`. Read more: https://beta.nextjs.org/docs/api-reference/cookies */
-  set(...args: any[]): never
-  /** @deprecated Method unavailable on `ReadonlyHeaders`. Read more: https://beta.nextjs.org/docs/api-reference/cookies */
-  delete(...args: any[]): never
+  /** @deprecated Method unavailable on `ReadonlyHeaders`. Read more: https://nextjs.org/docs/api-reference/headers */
+  append(...args: any[]): void
+  /** @deprecated Method unavailable on `ReadonlyHeaders`. Read more: https://nextjs.org/docs/api-reference/headers */
+  set(...args: any[]): void
+  /** @deprecated Method unavailable on `ReadonlyHeaders`. Read more: https://nextjs.org/docs/api-reference/headers */
+  delete(...args: any[]): void
 }
 export class HeadersAdapter extends Headers {
   private readonly headers: IncomingHttpHeaders