diff --git a/PropertyDescriber/PropertyDescriberInterface.php b/PropertyDescriber/PropertyDescriberInterface.php
index a02efe591..1e57e8f3c 100644
--- a/PropertyDescriber/PropertyDescriberInterface.php
+++ b/PropertyDescriber/PropertyDescriberInterface.php
@@ -18,8 +18,10 @@ interface PropertyDescriberInterface
 {
     /**
      * @param Type[] $types
+     *
+     * @param Schema $schema Allows to make changes inside of the schema (e.g. adding required fields)
      */
-    public function describe(array $types, Schema $property, array $groups = null, ?Schema $schema = null);
+    public function describe(array $types, Schema $property, array $groups = null /*, ?Schema $schema = null */);
 
     /**
      * @param Type[] $types