diff --git a/application/WarehouseArticle/WarehouseArticleController.php b/application/WarehouseArticle/WarehouseArticleController.php
index cfee60901..c80214bfd 100644
--- a/application/WarehouseArticle/WarehouseArticleController.php
+++ b/application/WarehouseArticle/WarehouseArticleController.php
@@ -53,11 +53,11 @@ class WarehouseArticleController extends TTCrud {
         $this->additionalJSVariables['WAREHOUSE_ADMIN'] = false;
     }
 
-    protected function beforeCreate() {
+    protected function beforeCreate($postData): bool {
         if (!in_array($this->user->id, [2, 5, 6, 145, 14]))
             self::sendError("Sie haben keine Berechtigung, Artikel zu erstellen.");
 
-        $this->validateArticleNumber($_POST);
+        $this->validateArticleNumber($postData);
         return true;
     }