diff --git a/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeToStringTransformer.php b/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeToStringTransformer.php
index cbaac96859..f7c4eb4798 100644
--- a/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeToStringTransformer.php
+++ b/src/Symfony/Component/Form/Extension/Core/DataTransformer/DateTimeToStringTransformer.php
@@ -140,6 +140,17 @@ class DateTimeToStringTransformer extends BaseDateTimeTransformer
             $outputTz = new \DateTimeZone($this->outputTimezone);
             $dateTime = \DateTime::createFromFormat($this->parseFormat, $value, $outputTz);
 
+            $lastErrors = \DateTime::getLastErrors();
+
+            if (0 < $lastErrors['warning_count'] || 0 < $lastErrors['error_count']) {
+                throw new TransformationFailedException(
+                    implode(', ', array_merge(
+                        array_values($lastErrors['warnings']),
+                        array_values($lastErrors['errors'])
+                    ))
+                );
+            }
+
             // On PHP versions < 5.3.8 we need to emulate the pipe operator
             // and reset parts not given in the format to their equivalent
             // of the UNIX base timestamp.
@@ -204,17 +215,6 @@ class DateTimeToStringTransformer extends BaseDateTimeTransformer
                 }
             }
 
-            $lastErrors = \DateTime::getLastErrors();
-
-            if (0 < $lastErrors['warning_count'] || 0 < $lastErrors['error_count']) {
-                throw new TransformationFailedException(
-                    implode(', ', array_merge(
-                        array_values($lastErrors['warnings']),
-                        array_values($lastErrors['errors'])
-                    ))
-                );
-            }
-
             if ($this->inputTimezone !== $this->outputTimezone) {
                 $dateTime->setTimeZone(new \DateTimeZone($this->inputTimezone));
             }
diff --git a/src/Symfony/Component/Form/Tests/AbstractLayoutTest.php b/src/Symfony/Component/Form/Tests/AbstractLayoutTest.php
index 1f296a81df..aa3d46bf2e 100644
--- a/src/Symfony/Component/Form/Tests/AbstractLayoutTest.php
+++ b/src/Symfony/Component/Form/Tests/AbstractLayoutTest.php
@@ -876,8 +876,10 @@ abstract class AbstractLayoutTest extends FormIntegrationTestCase
 
     public function testDateTimeWithEmptyValueOnTime()
     {
-        $form = $this->factory->createNamed('name', 'datetime', '2011-02-03', array(
-            'input' => 'string',
+        $data = array('year' => '2011', 'month' => '2', 'day' => '3', 'hour' => '', 'minute' => '');
+
+        $form = $this->factory->createNamed('name', 'datetime', $data, array(
+            'input' => 'array',
             'empty_value' => array('hour' => 'Change&Me', 'minute' => 'Change&Me'),
             'required' => false,
         ));