diff --git a/.changeset/shaky-queens-know.md b/.changeset/shaky-queens-know.md
new file mode 100644
index 000000000000..20b4d8221b16
--- /dev/null
+++ b/.changeset/shaky-queens-know.md
@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Fixes a dev server error where an SSR full reload triggered by a third-party Vite plugin (such as `@tailwindcss/vite`) could fail with `Failed to load url astro:server-app.js`
diff --git a/packages/astro/src/vite-plugin-app/index.ts b/packages/astro/src/vite-plugin-app/index.ts
index 1989468ee2a2..c5da519168cc 100644
--- a/packages/astro/src/vite-plugin-app/index.ts
+++ b/packages/astro/src/vite-plugin-app/index.ts
@@ -2,7 +2,7 @@ import type * as vite from 'vite';
 
 const ASTRO_APP_ID = 'virtual:astro:app';
 const RESOLVED_ASTRO_APP_ID = '\0' + ASTRO_APP_ID;
-export const ASTRO_DEV_SERVER_APP_ID = 'astro:server-app';
+export const ASTRO_DEV_SERVER_APP_ID = 'virtual:astro:server-app';
 
 export function vitePluginApp(): vite.Plugin[] {
 	let command: vite.ResolvedConfig['command'];