diff --git a/src/Symfony/Component/Form/Form.php b/src/Symfony/Component/Form/Form.php
index d7109bd3ac3eb..7c94fe395f96f 100644
--- a/src/Symfony/Component/Form/Form.php
+++ b/src/Symfony/Component/Form/Form.php
@@ -758,7 +758,7 @@ public function isEmpty()
      */
     public function isValid()
     {
-        if (!$this->submitted) {
+        if (!$this->submitted || $this->transformationFailure) {
             return false;
         }
 
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/Type/ChoiceTypeTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/Type/ChoiceTypeTest.php
index b675d5d6eee08..f7e8484fd840f 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/Type/ChoiceTypeTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/Type/ChoiceTypeTest.php
@@ -524,6 +524,7 @@ public function testSubmitSingleNonExpandedInvalidChoice()
 
         $this->assertNull($form->getData());
         $this->assertEquals('foobar', $form->getViewData());
+        $this->assertFalse($form->isValid());
         $this->assertFalse($form->isSynchronized());
     }
 
@@ -945,6 +946,7 @@ public function testSubmitSingleExpandedRequiredInvalidChoice()
         $this->assertNull($form->getData());
         $this->assertSame('foobar', $form->getViewData());
         $this->assertEmpty($form->getExtraData());
+        $this->assertFalse($form->isValid());
         $this->assertFalse($form->isSynchronized());
 
         $this->assertFalse($form[0]->getData());