diff --git a/packages/next/src/server/base-server.ts b/packages/next/src/server/base-server.ts
index 8f366765ec2fa..274aa784d9f11 100644
--- a/packages/next/src/server/base-server.ts
+++ b/packages/next/src/server/base-server.ts
@@ -766,7 +766,7 @@ export default abstract class Server<
           this.handleRequestImpl(req, res, parsedUrl).finally(() => {
             if (!span) return
 
-            const isRSCRequest = isRSCRequestCheck(req)
+            const isRSCRequest = getRequestMeta(req, 'isRSCRequest')
             span.setAttributes({
               'http.status_code': res.statusCode,
               'next.rsc': isRSCRequest,
@@ -1305,7 +1305,7 @@ export default abstract class Server<
     resolvedPathname: string
   ): void {
     const baseVaryHeader = `${RSC_HEADER}, ${NEXT_ROUTER_STATE_TREE}, ${NEXT_ROUTER_PREFETCH_HEADER}`
-    const isRSCRequest = isRSCRequestCheck(req)
+    const isRSCRequest = getRequestMeta(req, 'isRSCRequest')
 
     let addedNextUrlToVary = false
 
@@ -1475,7 +1475,7 @@ export default abstract class Server<
     }
 
     // Don't delete headers[RSC] yet, it still needs to be used in renderToHTML later
-    const isRSCRequest = isRSCRequestCheck(req)
+    const isRSCRequest = getRequestMeta(req, 'isRSCRequest') ?? false
 
     const { routeModule } = components
 
@@ -3121,18 +3121,3 @@ export default abstract class Server<
     return this.renderError(null, req, res, pathname!, query, setHeaders)
   }
 }
-
-/**
- * Check if the request is a RSC request. This is only attached after the
- * `handle` method is called, or at least the `requestAdapter.adapt` is called
- * on the request.
- */
-export function isRSCRequestCheck(req: BaseNextRequest): boolean {
-  // In edge, we can just check the header, as it's not set via request
-  // metadata.
-  if (process.env.NEXT_RUNTIME === 'edge') {
-    return req.headers[RSC_HEADER.toLowerCase()] === '1'
-  } else {
-    return getRequestMeta(req, 'isRSCRequest') === true
-  }
-}
diff --git a/packages/next/src/server/next-server.ts b/packages/next/src/server/next-server.ts
index fad20c6be5afc..314870811e30d 100644
--- a/packages/next/src/server/next-server.ts
+++ b/packages/next/src/server/next-server.ts
@@ -59,7 +59,7 @@ import type {
   NextEnabledDirectories,
   BaseRequestHandler,
 } from './base-server'
-import BaseServer, { NoFallbackError, isRSCRequestCheck } from './base-server'
+import BaseServer, { NoFallbackError } from './base-server'
 import { getMaybePagePath, getPagePath, requireFontManifest } from './require'
 import { denormalizePagePath } from '../shared/lib/page-path/denormalize-page-path'
 import { normalizePagePath } from '../shared/lib/page-path/normalize-page-path'
@@ -1133,7 +1133,7 @@ export default class NextNodeServer extends BaseServer<
 
           // NOTE: this is only attached after handle has started, this runs
           // after the response has been sent, so it should have it set.
-          const isRSC = isRSCRequestCheck(normalizedReq)
+          const isRSC = getRequestMeta(normalizedReq, 'isRSCRequest')
 
           const reqEnd = Date.now()
           const fetchMetrics = normalizedReq.fetchMetrics || []