diff --git a/packages/next/src/build/webpack/loaders/next-edge-app-route-loader/index.ts b/packages/next/src/build/webpack/loaders/next-edge-app-route-loader/index.ts
index 60b82966e3ce..e68e0573184d 100644
--- a/packages/next/src/build/webpack/loaders/next-edge-app-route-loader/index.ts
+++ b/packages/next/src/build/webpack/loaders/next-edge-app-route-loader/index.ts
@@ -15,7 +15,7 @@ export type EdgeAppRouteLoaderQuery = {
 }
 
 const EdgeAppRouteLoader: webpack.LoaderDefinitionFunction<EdgeAppRouteLoaderQuery> =
-  async function (this) {
+  function (this) {
     const {
       page,
       absolutePagePath,
diff --git a/packages/next/src/build/webpack/loaders/next-edge-ssr-loader/index.ts b/packages/next/src/build/webpack/loaders/next-edge-ssr-loader/index.ts
index e9b34ad67b17..f4f0e247f35d 100644
--- a/packages/next/src/build/webpack/loaders/next-edge-ssr-loader/index.ts
+++ b/packages/next/src/build/webpack/loaders/next-edge-ssr-loader/index.ts
@@ -39,7 +39,7 @@ function swapDistFolderWithEsmDistFolder(path: string) {
 }
 
 const edgeSSRLoader: webpack.LoaderDefinitionFunction<EdgeSSRLoaderQuery> =
-  async function edgeSSRLoader(this) {
+  function edgeSSRLoader(this) {
     const {
       dev,
       page,
diff --git a/packages/next/src/build/webpack/loaders/next-flight-client-entry-loader.ts b/packages/next/src/build/webpack/loaders/next-flight-client-entry-loader.ts
index 25ab2cf9d7be..0be3b6fa2b75 100644
--- a/packages/next/src/build/webpack/loaders/next-flight-client-entry-loader.ts
+++ b/packages/next/src/build/webpack/loaders/next-flight-client-entry-loader.ts
@@ -11,7 +11,7 @@ export type NextFlightClientEntryLoaderOptions = {
   server: boolean | 'true' | 'false'
 }
 
-export default async function transformSource(this: any): Promise<string> {
+export default function transformSource(this: any) {
   let { modules, server }: NextFlightClientEntryLoaderOptions =
     this.getOptions()
   const isServer = server === 'true'
diff --git a/packages/next/src/build/webpack/loaders/next-flight-client-module-loader.ts b/packages/next/src/build/webpack/loaders/next-flight-client-module-loader.ts
index a827a567d2b5..3a5001697e06 100644
--- a/packages/next/src/build/webpack/loaders/next-flight-client-module-loader.ts
+++ b/packages/next/src/build/webpack/loaders/next-flight-client-module-loader.ts
@@ -1,7 +1,7 @@
 import { getRSCModuleInformation } from '../../analysis/get-page-static-info'
 import { getModuleBuildInfo } from './get-module-build-info'
 
-export default async function transformSource(
+export default function transformSource(
   this: any,
   source: string,
   sourceMap: any
@@ -11,8 +11,6 @@ export default async function transformSource(
     throw new Error('Expected source to have been transformed to a string.')
   }
 
-  const callback = this.async()
-
   // Assign the RSC meta information to buildInfo.
   const buildInfo = getModuleBuildInfo(this._module)
   buildInfo.rsc = getRSCModuleInformation(source, false)
@@ -31,5 +29,5 @@ ${source}
 `
   }
 
-  return callback(null, source, sourceMap)
+  return this.callback(null, source, sourceMap)
 }