diff --git a/frontend/src/backupApi.js b/frontend/src/backupApi.js
index 15ed9f7..8a1c022 100644
--- a/frontend/src/backupApi.js
+++ b/frontend/src/backupApi.js
@@ -1,6 +1,6 @@
 import { getToken } from './authApi';
 
-const API_BASE_URL = window.ENV?.API_URL || 'http://localhost:8000';
+const API_BASE_URL = window.__ENV__?.API_BASE || 'http://localhost:8000';
 
 /**
  * Trigger a manual database backup (admin only)