diff --git a/packages/ts/file-router/src/vite-plugin.ts b/packages/ts/file-router/src/vite-plugin.ts
index 0f2ab98762..b4701cdd64 100644
--- a/packages/ts/file-router/src/vite-plugin.ts
+++ b/packages/ts/file-router/src/vite-plugin.ts
@@ -112,7 +112,8 @@ export default function vitePluginFileSystemRouter({
     },
     transform(code, id): Promise<TransformResult> | TransformResult {
       let modifiedCode = code;
-      if (id.startsWith(fileURLToPath(_viewsDir)) && !basename(id).startsWith('_')) {
+      const viewsDirUsingSlashes = fileURLToPath(_viewsDir).replaceAll('\\', '/');
+      if (id.startsWith(viewsDirUsingSlashes) && !basename(id).startsWith('_')) {
         if (isDevMode) {
           // To enable HMR for route files with exported configurations, we need
           // to address a limitation in `react-refresh`. This library requires