diff --git a/src/Hydrator/Strategy/StrategyInterface.php b/src/Hydrator/Strategy/StrategyInterface.php
index 85c21cc3f..8a16355fb 100644
--- a/src/Hydrator/Strategy/StrategyInterface.php
+++ b/src/Hydrator/Strategy/StrategyInterface.php
@@ -9,12 +9,16 @@
 
 namespace Zend\Stdlib\Hydrator\Strategy;
 
+/**
+ * @todo v3.0, add optional object/data to extract/hydrate.
+ */
 interface StrategyInterface
 {
     /**
      * Converts the given value so that it can be extracted by the hydrator.
      *
-     * @param mixed $value The original value.
+     * @param mixed   $value The original value.
+     * @param object $object (optional) The original object for context.
      * @return mixed Returns the value that should be extracted.
      */
     public function extract($value);
@@ -23,6 +27,7 @@ public function extract($value);
      * Converts the given value so that it can be hydrated by the hydrator.
      *
      * @param mixed $value The original value.
+     * @param array  $data (optional) The original data for context.
      * @return mixed Returns the value that should be hydrated.
      */
     public function hydrate($value);