diff --git a/src/Symfony/Component/HttpKernel/Tests/UriSignerTest.php b/src/Symfony/Component/HttpKernel/Tests/UriSignerTest.php
index b66014d849..37a1d2fe93 100644
--- a/src/Symfony/Component/HttpKernel/Tests/UriSignerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/UriSignerTest.php
@@ -33,6 +33,7 @@ class UriSignerTest extends \PHPUnit_Framework_TestCase
 
         $this->assertTrue($signer->check($signer->sign('http://example.com/foo')));
         $this->assertTrue($signer->check($signer->sign('http://example.com/foo?foo=bar')));
+        $this->assertTrue($signer->check($signer->sign('http://example.com/foo?foo=bar&0=integer')));
 
         $this->assertTrue($signer->sign('http://example.com/foo?foo=bar&bar=foo') === $signer->sign('http://example.com/foo?bar=foo&foo=bar'));
     }
diff --git a/src/Symfony/Component/HttpKernel/UriSigner.php b/src/Symfony/Component/HttpKernel/UriSigner.php
index d77d27430d..5a96ef2228 100644
--- a/src/Symfony/Component/HttpKernel/UriSigner.php
+++ b/src/Symfony/Component/HttpKernel/UriSigner.php
@@ -91,8 +91,8 @@ class UriSigner
 
     private function buildUrl(array $url, array $params = array())
     {
-        ksort($params);
-        $url['query'] = http_build_query($params);
+        ksort($params, SORT_STRING);
+        $url['query'] = http_build_query($params, '', '&');
 
         $scheme = isset($url['scheme']) ? $url['scheme'].'://' : '';
         $host = isset($url['host']) ? $url['host'] : '';