diff --git a/src/ORM/Association.php b/src/ORM/Association.php
index 4770de2c9aa..19d7a22bac0 100644
--- a/src/ORM/Association.php
+++ b/src/ORM/Association.php
@@ -641,6 +641,8 @@ protected function _appendNotMatching($query, $options)
      *   should be found
      * @param bool $joined Whether or not the row is a result of a direct join
      *   with this association
+     * @param string $targetProperty The property name in the source results where the association
+     * data shuld be nested in. Will use the default one if not provided.
      * @return array
      */
     public function transformRow($row, $nestKey, $joined, $targetProperty = null)