diff --git a/nur_src/v/bs3/fo/ControlSelect.php b/nur_src/v/bs3/fo/ControlSelect.php
index 9434b5a..e7ef5d6 100644
--- a/nur_src/v/bs3/fo/ControlSelect.php
+++ b/nur_src/v/bs3/fo/ControlSelect.php
@@ -116,7 +116,7 @@ class ControlSelect extends ControlVisual {
         return $item[$itemKeys[$itemIndex]] ?? null;
       }
     }
-    return null;
+    return "(unknown)";
   }
 
   function getControl(): array {