diff --git a/src/Symfony/Component/BrowserKit/Client.php b/src/Symfony/Component/BrowserKit/Client.php
index 08979f65a3b1..898c9342960a 100644
--- a/src/Symfony/Component/BrowserKit/Client.php
+++ b/src/Symfony/Component/BrowserKit/Client.php
@@ -303,7 +303,7 @@ public function request($method, $uri, array $parameters = array(), array $files
 
         $uri = $this->getAbsoluteUri($uri);
 
-        if (isset($server['HTTP_HOST'])) {
+        if (!empty($server['HTTP_HOST'])) {
             $uri = preg_replace('{^(https?\://)'.preg_quote($this->extractHost($uri)).'}', '${1}'.$server['HTTP_HOST'], $uri);
         }
 
diff --git a/src/Symfony/Component/BrowserKit/Tests/ClientTest.php b/src/Symfony/Component/BrowserKit/Tests/ClientTest.php
index 97205bf91153..39015d2cc560 100644
--- a/src/Symfony/Component/BrowserKit/Tests/ClientTest.php
+++ b/src/Symfony/Component/BrowserKit/Tests/ClientTest.php
@@ -399,6 +399,19 @@ public function testFollowRedirect()
         }
     }
 
+    public function testFollowRelativeRedirect()
+    {
+        $client = new TestClient();
+        $client->setNextResponse(new Response('', 302, array('Location' => '/redirected')));
+        $client->request('GET', 'http://www.example.com/foo/foobar');
+        $this->assertEquals('http://www.example.com/redirected', $client->getRequest()->getUri(), '->followRedirect() follows a redirect if any');
+
+        $client = new TestClient();
+        $client->setNextResponse(new Response('', 302, array('Location' => '/redirected:1234')));
+        $client->request('GET', 'http://www.example.com/foo/foobar');
+        $this->assertEquals('http://www.example.com/redirected:1234', $client->getRequest()->getUri(), '->followRedirect() follows relative urls');
+    }
+
     public function testFollowRedirectWithMaxRedirects()
     {
         $client = new TestClient();