diff --git a/src/Symfony/Component/Validator/Constraints/DateTimeValidator.php b/src/Symfony/Component/Validator/Constraints/DateTimeValidator.php
index 29864b49c0aea..15622a63ef32c 100644
--- a/src/Symfony/Component/Validator/Constraints/DateTimeValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/DateTimeValidator.php
@@ -31,7 +31,7 @@ public function validate($value, Constraint $constraint)
             throw new UnexpectedTypeException($constraint, __NAMESPACE__.'\DateTime');
         }
 
-        if (null === $value || '' === $value || $value instanceof \DateTime) {
+        if (null === $value || '' === $value || $value instanceof \DateTimeInterface) {
             return;
         }
 
diff --git a/src/Symfony/Component/Validator/Constraints/DateValidator.php b/src/Symfony/Component/Validator/Constraints/DateValidator.php
index e14791c16aaf5..db900f0a56082 100644
--- a/src/Symfony/Component/Validator/Constraints/DateValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/DateValidator.php
@@ -48,7 +48,7 @@ public function validate($value, Constraint $constraint)
             throw new UnexpectedTypeException($constraint, __NAMESPACE__.'\Date');
         }
 
-        if (null === $value || '' === $value || $value instanceof \DateTime) {
+        if (null === $value || '' === $value || $value instanceof \DateTimeInterface) {
             return;
         }