diff --git a/packages/astro/src/vite-plugin-build-css/index.ts b/packages/astro/src/vite-plugin-build-css/index.ts
index 0a1757842..b62114181 100644
--- a/packages/astro/src/vite-plugin-build-css/index.ts
+++ b/packages/astro/src/vite-plugin-build-css/index.ts
@@ -9,9 +9,9 @@ import { STYLE_EXTENSIONS } from '../core/ssr/css.js';
 const PLUGIN_NAME = '@astrojs/rollup-plugin-build-css';
 
 // This is a virtual module that represents the .astro <style> usage on a page
-const ASTRO_STYLE_PREFIX = '@astro-inline-style';
+const ASTRO_STYLE_PREFIX = '\0astro-inline-style';
 
-const ASTRO_PAGE_STYLE_PREFIX = '@astro-page-all-styles';
+const ASTRO_PAGE_STYLE_PREFIX = '\0astro-page-all-styles';
 
 const cssRe = new RegExp(
 	`\\.(${Array.from(STYLE_EXTENSIONS)