diff --git a/src/Symfony/Component/HttpFoundation/Response.php b/src/Symfony/Component/HttpFoundation/Response.php
index ae6a3896e0..6950793616 100644
--- a/src/Symfony/Component/HttpFoundation/Response.php
+++ b/src/Symfony/Component/HttpFoundation/Response.php
@@ -379,7 +379,10 @@ class Response
      * Sets the response status code.
      *
      * @param integer $code HTTP status code
-     * @param string  $text HTTP status text
+     * @param mixed   $text HTTP status text
+     *
+     * If the status text is null it will be automatically populated for the known
+     * status codes and left empty otherwise.
      *
      * @return Response
      *
@@ -389,12 +392,24 @@ class Response
      */
     public function setStatusCode($code, $text = null)
     {
-        $this->statusCode = (int) $code;
+        $this->statusCode = $code = (int) $code;
         if ($this->isInvalid()) {
             throw new \InvalidArgumentException(sprintf('The HTTP status code "%s" is not valid.', $code));
         }
 
-        $this->statusText = false === $text ? '' : (null === $text ? self::$statusTexts[$this->statusCode] : $text);
+        if (null === $text) {
+            $this->statusText = isset(self::$statusTexts[$code]) ? self::$statusTexts[$code] : '';
+
+            return $this;
+        }
+
+        if (false === $text) {
+            $this->statusText = '';
+
+            return $this;
+        }
+
+        $this->statusText = $text;
 
         return $this;
     }
diff --git a/src/Symfony/Component/HttpFoundation/Tests/ResponseTest.php b/src/Symfony/Component/HttpFoundation/Tests/ResponseTest.php
index 4edcd6dd1d..cbbdd29aa0 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/ResponseTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/ResponseTest.php
@@ -367,6 +367,33 @@ class ResponseTest extends \PHPUnit_Framework_TestCase
         $this->assertFalse($response->isInvalid());
     }
 
+    /**
+     * @dataProvider getStatusCodeFixtures
+     */
+    public function testSetStatusCode($code, $text, $expectedText)
+    {
+        $response = new Response();
+
+        $response->setStatusCode($code, $text);
+
+        $statusText = new \ReflectionProperty($response, 'statusText');
+        $statusText->setAccessible(true);
+
+        $this->assertEquals($expectedText, $statusText->getValue($response));
+    }
+
+    public function getStatusCodeFixtures()
+    {
+        return array(
+            array('200', null, 'OK'),
+            array('200', false, ''),
+            array('200', 'foo', 'foo'),
+            array('199', null, ''),
+            array('199', false, ''),
+            array('199', 'foo', 'foo')
+        );
+    }
+
     public function testIsInformational()
     {
         $response = new Response('', 100);
diff --git a/src/Symfony/Component/Validator/Mapping/Loader/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd b/src/Symfony/Component/Validator/Mapping/Loader/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd
index 6d5d3b5f95..4a9bc33989 100644
--- a/src/Symfony/Component/Validator/Mapping/Loader/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd
+++ b/src/Symfony/Component/Validator/Mapping/Loader/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd
@@ -51,12 +51,12 @@
         definitions.
       ]]></xsd:documentation>
     </xsd:annotation>
-    <xsd:sequence>
+    <xsd:choice minOccurs="0" maxOccurs="unbounded">
       <xsd:element name="group-sequence-provider" type="group-sequence-provider" minOccurs="0" maxOccurs="1" />
       <xsd:element name="constraint" type="constraint" minOccurs="0" maxOccurs="unbounded" />
       <xsd:element name="property" type="property" minOccurs="0" maxOccurs="unbounded" />
       <xsd:element name="getter" type="getter" minOccurs="0" maxOccurs="unbounded" />
-    </xsd:sequence>
+    </xsd:choice>
     <xsd:attribute name="name" type="xsd:string" use="required" />
   </xsd:complexType>
   
@@ -144,4 +144,4 @@
     </xsd:choice>
     <xsd:attribute name="key" type="xsd:string" use="optional" /> 
   </xsd:complexType>
-</xsd:schema>
\ No newline at end of file
+</xsd:schema>