diff --git a/packages/next/src/build/webpack/loaders/next-metadata-route-loader.ts b/packages/next/src/build/webpack/loaders/next-metadata-route-loader.ts
index f709ce018a9aa0..a3b71536555857 100644
--- a/packages/next/src/build/webpack/loaders/next-metadata-route-loader.ts
+++ b/packages/next/src/build/webpack/loaders/next-metadata-route-loader.ts
@@ -76,6 +76,8 @@ async function getStaticAssetRouteCode(
   resourcePath: string,
   fileBaseName: string
 ) {
+  resourcePath = path.posix.normalize(resourcePath)
+
   const cache =
     fileBaseName === 'favicon'
       ? 'public, max-age=0, must-revalidate'