diff --git a/src/Symfony/Component/Form/Extension/Core/DataTransformer/BaseDateTimeTransformer.php b/src/Symfony/Component/Form/Extension/Core/DataTransformer/BaseDateTimeTransformer.php
index fe74d2605c..e4e8932ee9 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataTransformer/BaseDateTimeTransformer.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataTransformer/BaseDateTimeTransformer.php
@@ -12,6 +12,7 @@
 namespace Symfony\Component\Form\Extension\Core\DataTransformer;
 
 use Symfony\Component\Form\DataTransformerInterface;
+use Symfony\Component\Form\Exception\UnexpectedTypeException;
 
 abstract class BaseDateTimeTransformer implements DataTransformerInterface
 {
diff --git a/src/Symfony/Component/Form/Form.php b/src/Symfony/Component/Form/Form.php
index 1b4994fce0..3815386a39 100644
--- a/src/Symfony/Component/Form/Form.php
+++ b/src/Symfony/Component/Form/Form.php
@@ -76,7 +76,7 @@ class Form implements \IteratorAggregate, FormInterface
 
     /**
      * The mapper for mapping data to children and back
-     * @var DataMapper\DataMapperInterface
+     * @var DataMapperInterface
      */
     private $dataMapper;