diff --git a/packages/qwik/src/optimizer/src/plugins/vite.ts b/packages/qwik/src/optimizer/src/plugins/vite.ts
index d8119d3c37e..e2ed15f9578 100644
--- a/packages/qwik/src/optimizer/src/plugins/vite.ts
+++ b/packages/qwik/src/optimizer/src/plugins/vite.ts
@@ -153,7 +153,7 @@ export function qwikVite(qwikViteOpts: QwikVitePluginOptions = {}): any {
         transformedModuleOutput: qwikViteOpts.transformedModuleOutput,
         vendorRoots: [...(qwikViteOpts.vendorRoots ?? []), ...vendorRoots.map((v) => v.path)],
         outDir: viteConfig.build?.assetsDir
-          ? (viteConfig.build?.outDir || CLIENT_OUT_DIR + '/') + viteConfig.build?.assetsDir
+          ? path.join(viteConfig.build?.outDir || CLIENT_OUT_DIR, viteConfig.build?.assetsDir)
           : viteConfig.build?.outDir,
         devTools: qwikViteOpts.devTools,
         sourcemap: !!viteConfig.build?.sourcemap,