diff --git a/src/Symfony/Component/Form/Extension/Core/Type/DateType.php b/src/Symfony/Component/Form/Extension/Core/Type/DateType.php
index 648ab1b7e5..667b7db3d1 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/DateType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/DateType.php
@@ -271,7 +271,7 @@ class DateType extends AbstractType
         if (version_compare(\PHP_VERSION, '5.5.0-dev', '>=')) {
             $formatter->setTimeZone(\DateTimeZone::UTC);
         } else {
-            $formatter->setTimeZoneId(\DateTimeZone::UTC);
+            $formatter->setTimeZoneId('UTC');
         }
 
         if (preg_match($regex, $pattern, $matches)) {