diff --git a/packages/qwik/src/optimizer/src/plugins/vite-dev-server.ts b/packages/qwik/src/optimizer/src/plugins/vite-dev-server.ts
index f844f244295..704aa404404 100644
--- a/packages/qwik/src/optimizer/src/plugins/vite-dev-server.ts
+++ b/packages/qwik/src/optimizer/src/plugins/vite-dev-server.ts
@@ -1,19 +1,19 @@
 /* eslint-disable no-console */
 import type { Render, RenderToStreamOptions } from '@builder.io/qwik/server';
-import { magenta } from 'kleur/colors';
 import type { IncomingMessage, ServerResponse } from 'http';
+import { magenta } from 'kleur/colors';
 
 import type { Connect, ViteDevServer } from 'vite';
+import { SYNC_QRL } from '../../../core/qrl/qrl-class';
 import type { OptimizerSystem, Path, QwikManifest, SymbolMapper, SymbolMapperFn } from '../types';
-import { type NormalizedQwikPluginOptions, parseId, makeNormalizePath } from './plugin';
-import type { QwikViteDevResponse } from './vite';
-import { formatError } from './vite-utils';
-import { VITE_ERROR_OVERLAY_STYLES } from './vite-error';
-import imageDevTools from './image-size-runtime.html?raw';
 import clickToComponent from './click-to-component.html?raw';
-import perfWarning from './perf-warning.html?raw';
 import errorHost from './error-host.html?raw';
-import { SYNC_QRL } from '../../../core/qrl/qrl-class';
+import imageDevTools from './image-size-runtime.html?raw';
+import perfWarning from './perf-warning.html?raw';
+import { makeNormalizePath, type NormalizedQwikPluginOptions, parseId } from './plugin';
+import type { QwikViteDevResponse } from './vite';
+import { VITE_ERROR_OVERLAY_STYLES } from './vite-error';
+import { formatError, isWin } from './vite-utils';
 
 function getOrigin(req: IncomingMessage) {
   const { PROTOCOL_HEADER, HOST_HEADER } = process.env;
@@ -59,11 +59,13 @@ function createSymbolMapper(
       return [symbolName, `${base}${symbolName}.js`];
     }
     // on windows, absolute paths don't start with a slash
+    const maybeSlash = isWin(sys.os) ? '/' : '';
+
     const parentPath = normalizePath(path.dirname(parent));
     const parentFile = path.basename(parent);
     const qrlPath = parentPath.startsWith(opts.rootDir)
       ? normalizePath(path.relative(opts.rootDir, parentPath))
-      : `@fs/${parentPath}`;
+      : `@fs${maybeSlash}${parentPath}`;
     const qrlFile = encode(`${qrlPath}/${parentFile}_${symbolName}.js`);
     return [symbolName, `${base}${qrlFile}`];
   };