diff --git a/src/Symfony/Component/HttpFoundation/Request.php b/src/Symfony/Component/HttpFoundation/Request.php
index b10504b428..7257de7ce4 100644
--- a/src/Symfony/Component/HttpFoundation/Request.php
+++ b/src/Symfony/Component/HttpFoundation/Request.php
@@ -674,6 +674,10 @@ class Request
      */
     public function getFormat($mimeType)
     {
+        if (false !== $pos = strpos($mimeType, ';')) {
+            $mimeType = substr($mimeType, 0, $pos);
+        }
+
         if (null === static::$formats) {
             static::initializeFormats();
         }
diff --git a/tests/Symfony/Tests/Component/HttpFoundation/RequestTest.php b/tests/Symfony/Tests/Component/HttpFoundation/RequestTest.php
index cd1785a1c0..9d4c701504 100644
--- a/tests/Symfony/Tests/Component/HttpFoundation/RequestTest.php
+++ b/tests/Symfony/Tests/Component/HttpFoundation/RequestTest.php
@@ -146,6 +146,15 @@ class RequestTest extends \PHPUnit_Framework_TestCase
         }
     }
 
+    /**
+     * @covers Symfony\Component\HttpFoundation\Request::getFormat
+     */
+    public function testGetFormatFromMimeTypeWithParameters()
+    {
+        $request = new Request();
+        $this->assertEquals('json', $request->getFormat('application/json; charset=utf-8'));
+    }
+
     /**
      * @covers Symfony\Component\HttpFoundation\Request::getMimeType
      * @dataProvider getFormatToMimeTypeMapProvider