diff --git a/backend/lib/Router.php b/backend/lib/Router.php
index 6b3267d..beac791 100644
--- a/backend/lib/Router.php
+++ b/backend/lib/Router.php
@@ -223,7 +223,7 @@ class Router {
 		$config->setAutoGenerateProxyClasses(Util\Configuration::read('devmode'));
 
 		$dbConfig = Util\Configuration::read('db');
-		if ($admin) {
+		if ($admin && isset($dbConfig['admin'])) {
 			$dbConfig = array_merge($dbConfig, $dbConfig['admin']);
 		}