diff --git a/lib/Db/ExAppMapper.php b/lib/Db/ExAppMapper.php
index 2bd31246..b4fb36d6 100644
--- a/lib/Db/ExAppMapper.php
+++ b/lib/Db/ExAppMapper.php
@@ -200,6 +200,9 @@ public function registerExAppRoutes(ExApp $exApp, array $routes): int {
 			if (isset($route['bruteforce_protection']) && is_string($route['bruteforce_protection'])) {
 				$route['bruteforce_protection'] = json_decode($route['bruteforce_protection'], false);
 			}
+			if (!isset($route['headers_to_exclude'])) {
+				$route['headers_to_exclude'] = [];
+			}
 			$qb->insert('ex_apps_routes')
 				->values([
 					'appid' => $qb->createNamedParameter($exApp->getAppid()),