diff --git a/src/Forms/CompositeValidator.php b/src/Forms/CompositeValidator.php
index f08dd9491..89f16e699 100644
--- a/src/Forms/CompositeValidator.php
+++ b/src/Forms/CompositeValidator.php
@@ -221,6 +221,7 @@ class CompositeValidator extends Validator
     }
 
     /**
+     * @internal This method may be updated to public in the future. Let us know if you feel there is a use case for it.
      * @param int $key
      * @return CompositeValidator
      */