diff --git a/application/WarehouseCategory/WarehouseCategoryController.php b/application/WarehouseCategory/WarehouseCategoryController.php
index 443b0d8fa..b98a66a6d 100644
--- a/application/WarehouseCategory/WarehouseCategoryController.php
+++ b/application/WarehouseCategory/WarehouseCategoryController.php
@@ -27,4 +27,12 @@ class WarehouseCategoryController extends TTCrud {
     protected function getHistoryAction() {
         self::returnJson((new WarehouseHistoryController)->getHistory($this->request->id, $this->mod, $this->columns));
     }
+
+    protected function beforeDelete($postData): bool {
+        if (count(WarehouseArticleModel::getAll(['category_id' => $postData['id']])) === 0) return true;
+
+        http_response_code(500);
+        self::returnJson(['status' => 'error', 'message' => 'Die Kategorie kann nicht gelöscht werden, da sie in mindestens einem Artikel verwendet wird.']);
+        return false;
+    }
 }
\ No newline at end of file