diff --git a/lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php b/lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php
index d74db40bb..88f96cf76 100644
--- a/lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php
+++ b/lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php
@@ -21,7 +21,8 @@
 
 namespace Doctrine\ORM\Mapping\Driver;
 
-use Doctrine\ORM\Mapping\ClassMetadataInfo;
+use Doctrine\ORM\Mapping\ClassMetadataInfo,
+    Doctrine\ORM\Mapping\MappingException;
 
 /**
  * XmlDriver is a metadata driver that enables mapping through XML files.