diff --git a/src/Bundle/ChillPersonBundle/Export/Helper/ListPersonHelper.php b/src/Bundle/ChillPersonBundle/Export/Helper/ListPersonHelper.php
index 7a14e0446..69f797c3d 100644
--- a/src/Bundle/ChillPersonBundle/Export/Helper/ListPersonHelper.php
+++ b/src/Bundle/ChillPersonBundle/Export/Helper/ListPersonHelper.php
@@ -25,6 +25,7 @@ use Doctrine\ORM\Query;
 use Doctrine\ORM\QueryBuilder;
 use Exception;
 use PhpOffice\PhpSpreadsheet\Shared\Date;
+use RuntimeException;
 use Symfony\Contracts\Translation\TranslatorInterface;
 use function in_array;
 use function strlen;
@@ -390,16 +391,18 @@ class ListPersonHelper
                 };
 
             default:
-                // for fields which are associated with person
-                if (in_array($key, ListPersonHelper::FIELDS, true)) {
-                    return function ($value) use ($key) {
-                        if ('_header' === $value) {
-                            return $this->translator->trans($key);
-                        }
-
-                        return $value;
-                    };
+                if (!in_array($key, self::getAllPossibleFields(), true)) {
+                    throw new RuntimeException("this key is not supported by this helper: {$key}");
                 }
+
+                // for fields which are associated with person
+                return function ($value) use ($key) {
+                    if ('_header' === $value) {
+                        return $this->translator->trans($key);
+                    }
+
+                    return $value;
+                };
         }
     }