diff --git a/src/Symfony/Component/Form/Extension/Core/EventListener/FixUrlProtocolListener.php b/src/Symfony/Component/Form/Extension/Core/EventListener/FixUrlProtocolListener.php
index c18ca8a8b4..9e7761705e 100644
--- a/src/Symfony/Component/Form/Extension/Core/EventListener/FixUrlProtocolListener.php
+++ b/src/Symfony/Component/Form/Extension/Core/EventListener/FixUrlProtocolListener.php
@@ -36,7 +36,7 @@ class FixUrlProtocolListener implements EventSubscriberInterface
     {
         $data = $event->getData();
 
-        if ($this->defaultProtocol && $data && !preg_match('~^[\w+.-]+://~', $data)) {
+        if ($this->defaultProtocol && $data && is_string($data) && !preg_match('~^[\w+.-]+://~', $data)) {
             $event->setData($this->defaultProtocol.'://'.$data);
         }
     }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/Type/UrlTypeTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/Type/UrlTypeTest.php
index 2b4783e4d3..2be6b520d7 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/Type/UrlTypeTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/Type/UrlTypeTest.php
@@ -82,4 +82,12 @@ class UrlTypeTest extends TextTypeTest
             'default_protocol' => array(),
         ));
     }
+
+    public function testSubmitWithNonStringDataDoesNotBreakTheFixUrlProtocolListener()
+    {
+        $form = $this->factory->create(static::TESTED_TYPE);
+        $form->submit(array('domain.com', 'www.domain.com'));
+
+        $this->assertSame(array('domain.com', 'www.domain.com'), $form->getData());
+    }
 }