diff --git a/reference/forms/types/entity.rst b/reference/forms/types/entity.rst
index 58faabc5ea2..b5d8ff440d1 100644
--- a/reference/forms/types/entity.rst
+++ b/reference/forms/types/entity.rst
@@ -110,12 +110,22 @@ choice_label
     The ``choice_label`` option was introduced in Symfony 2.7. Prior to Symfony
     2.7, it was called ``property`` (which has the same functionality).
 
-**type**: ``string``
+**type**: ``string|callable``
 
 This is the property that should be used for displaying the entities
 as text in the HTML element. If left blank, the entity object will be
 cast into a string and so must have a ``__toString()`` method.
 
+The ``choice_label`` option can also be a callback that accepts 2 arguments: entity and index.
+You can use it like this::
+    
+      $builder->add('gender', 'entity', array(
+         'class' => 'MyBundle:Gender',
+         'choice_label' => function(MyBundle\Entity\Gender $gender, $index) {
+           return $index . '. ' . $gender->getLocalizedGender($this->locale);
+         },
+      ));
+
 .. note::
 
     The ``choice_label`` option is the property path used to display the option.