diff --git a/src/Symfony/Component/Form/FormFactory.php b/src/Symfony/Component/Form/FormFactory.php
index 8a7b1cab05..cfca4588bd 100644
--- a/src/Symfony/Component/Form/FormFactory.php
+++ b/src/Symfony/Component/Form/FormFactory.php
@@ -113,11 +113,11 @@ class FormFactory implements FormFactoryInterface
         $pattern = $patternGuess ? $patternGuess->getValue() : null;
 
         if (null !== $pattern) {
-            $options = array_merge(array('attr' => array('pattern' => $pattern)), $options);
+            $options = array_replace_recursive(array('attr' => array('pattern' => $pattern)), $options);
         }
 
         if (null !== $maxLength) {
-            $options = array_merge(array('attr' => array('maxlength' => $maxLength)), $options);
+            $options = array_replace_recursive(array('attr' => array('maxlength' => $maxLength)), $options);
         }
 
         if ($requiredGuess) {
diff --git a/src/Symfony/Component/Form/Tests/FormFactoryTest.php b/src/Symfony/Component/Form/Tests/FormFactoryTest.php
index a06b49876e..59e9e8085c 100644
--- a/src/Symfony/Component/Form/Tests/FormFactoryTest.php
+++ b/src/Symfony/Component/Form/Tests/FormFactoryTest.php
@@ -504,6 +504,41 @@ class FormFactoryTest extends \PHPUnit_Framework_TestCase
         $this->assertEquals('builderInstance', $this->builder);
     }
 
+    public function testCreateBuilderUsesMaxLengthAndPattern()
+    {
+        $this->guesser1->expects($this->once())
+            ->method('guessMaxLength')
+            ->with('Application\Author', 'firstName')
+            ->will($this->returnValue(new ValueGuess(
+                20,
+                Guess::HIGH_CONFIDENCE
+            )));
+
+        $this->guesser2->expects($this->once())
+            ->method('guessPattern')
+            ->with('Application\Author', 'firstName')
+            ->will($this->returnValue(new ValueGuess(
+                '.{5,}',
+                Guess::HIGH_CONFIDENCE
+            )));
+
+        $factory = $this->getMockFactory(array('createNamedBuilder'));
+
+        $factory->expects($this->once())
+            ->method('createNamedBuilder')
+            ->with('firstName', 'text', null, array('attr' => array('maxlength' => 20, 'pattern' => '.{5,}', 'class' => 'tinymce')))
+            ->will($this->returnValue('builderInstance'));
+
+        $this->builder = $factory->createBuilderForProperty(
+            'Application\Author',
+            'firstName',
+            null,
+            array('attr' => array('class' => 'tinymce'))
+        );
+
+        $this->assertEquals('builderInstance', $this->builder);
+    }
+
     public function testCreateBuilderUsesRequiredSettingWithHighestConfidence()
     {
         $this->guesser1->expects($this->once())