diff --git a/lib/Service/System/SystemInfoService.php b/lib/Service/System/SystemInfoService.php
index 65ad2a1..5f48516 100644
--- a/lib/Service/System/SystemInfoService.php
+++ b/lib/Service/System/SystemInfoService.php
@@ -111,7 +111,7 @@ class SystemInfoService
     private function resolveEnvironment(): string
     {
         if (defined('APP_ENV')) {
-            return (string) APP_ENV;
+            return (string) constant('APP_ENV');
         }
 
         $env = getenv('APP_ENV');