diff --git a/packages/next/src/executors/build/lib/create-next-config-file.ts b/packages/next/src/executors/build/lib/create-next-config-file.ts
index beeaf0cd15f1b..4171c4d4b6bcd 100644
--- a/packages/next/src/executors/build/lib/create-next-config-file.ts
+++ b/packages/next/src/executors/build/lib/create-next-config-file.ts
@@ -243,7 +243,7 @@ export function ensureFileExtensions(
   files: string[],
   absoluteDir: string
 ): string[] {
-  const extensions = ['.js', '.cjs', '.mjs', '.json'];
+  const extensions = ['.js', '.cjs', '.mjs', '.json', '.ts'];
   return files.map((file) => {
     const providedExt = extname(file);
     if (providedExt && extensions.includes(providedExt)) return file;