diff --git a/libraries/src/Form/FormField.php b/libraries/src/Form/FormField.php
index 645b8b06a59ec..c307df956279f 100644
--- a/libraries/src/Form/FormField.php
+++ b/libraries/src/Form/FormField.php
@@ -1123,7 +1123,7 @@ public function filter($value, $group = null, ?Registry $input = null)
             }
 
             if (\function_exists($filter)) {
-                return \call_user_func($filter, $value);
+                return $filter($value);
             }
 
             if ($this instanceof SubformField) {