diff --git a/src/Symfony/Component/Validator/Constraints/UniqueValidator.php b/src/Symfony/Component/Validator/Constraints/UniqueValidator.php
index 72403b59bdc2..ce98cd73477c 100644
--- a/src/Symfony/Component/Validator/Constraints/UniqueValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/UniqueValidator.php
@@ -13,6 +13,7 @@
 
 use Symfony\Component\Validator\Constraint;
 use Symfony\Component\Validator\ConstraintValidator;
+use Symfony\Component\Validator\Exception\UnexpectedTypeException;
 use Symfony\Component\Validator\Exception\UnexpectedValueException;
 
 /**