diff --git a/src/Symfony/Component/Routing/Generator/UrlGenerator.php b/src/Symfony/Component/Routing/Generator/UrlGenerator.php
index 2719934c97..e4870d5ae9 100644
--- a/src/Symfony/Component/Routing/Generator/UrlGenerator.php
+++ b/src/Symfony/Component/Routing/Generator/UrlGenerator.php
@@ -266,7 +266,7 @@ class UrlGenerator implements UrlGeneratorInterface, ConfigurableRequirementsInt
         $fragment = isset($extra['_fragment']) ? $extra['_fragment'] : '';
         unset($extra['_fragment']);
 
-        if ($extra && $query = http_build_query($extra, '', '&')) {
+        if ($extra && $query = http_build_query($extra, '', '&', PHP_QUERY_RFC3986)) {
             // "/" and "?" can be left decoded for better user experience, see
             // http://tools.ietf.org/html/rfc3986#section-3.4
             $url .= '?'.strtr($query, array('%2F' => '/'));
diff --git a/src/Symfony/Component/Routing/Tests/Generator/UrlGeneratorTest.php b/src/Symfony/Component/Routing/Tests/Generator/UrlGeneratorTest.php
index 2ac06ddd3c..ee335e5145 100644
--- a/src/Symfony/Component/Routing/Tests/Generator/UrlGeneratorTest.php
+++ b/src/Symfony/Component/Routing/Tests/Generator/UrlGeneratorTest.php
@@ -325,18 +325,24 @@ class UrlGeneratorTest extends \PHPUnit_Framework_TestCase
 
     public function testUrlEncoding()
     {
+        if (defined('PHP_QUERY_RFC3986')) {
+            $expectedPath = '/app.php/@:%5B%5D/%28%29*%27%22%20+,;-._~%26%24%3C%3E|%7B%7D%25%5C%5E%60!%3Ffoo=bar%23id'
+                .'/@:%5B%5D/%28%29*%27%22%20+,;-._~%26%24%3C%3E|%7B%7D%25%5C%5E%60!%3Ffoo=bar%23id'
+                .'?query=%40%3A%5B%5D/%28%29%2A%27%22%20%2B%2C%3B-._~%26%24%3C%3E%7C%7B%7D%25%5C%5E%60%21%3Ffoo%3Dbar%23id';
+        } else {
+            $expectedPath = '/app.php/@:%5B%5D/%28%29*%27%22%20+,;-._~%26%24%3C%3E|%7B%7D%25%5C%5E%60!%3Ffoo=bar%23id'
+                .'/@:%5B%5D/%28%29*%27%22%20+,;-._~%26%24%3C%3E|%7B%7D%25%5C%5E%60!%3Ffoo=bar%23id'
+                .'?query=%40%3A%5B%5D/%28%29%2A%27%22+%2B%2C%3B-._%7E%26%24%3C%3E%7C%7B%7D%25%5C%5E%60%21%3Ffoo%3Dbar%23id';
+        }
+
         // This tests the encoding of reserved characters that are used for delimiting of URI components (defined in RFC 3986)
         // and other special ASCII chars. These chars are tested as static text path, variable path and query param.
         $chars = '@:[]/()*\'" +,;-._~&$<>|{}%\\^`!?foo=bar#id';
         $routes = $this->getRoutes('test', new Route("/$chars/{varpath}", array(), array('varpath' => '.+')));
-        $this->assertSame('/app.php/@:%5B%5D/%28%29*%27%22%20+,;-._~%26%24%3C%3E|%7B%7D%25%5C%5E%60!%3Ffoo=bar%23id'
-           .'/@:%5B%5D/%28%29*%27%22%20+,;-._~%26%24%3C%3E|%7B%7D%25%5C%5E%60!%3Ffoo=bar%23id'
-           .'?query=%40%3A%5B%5D/%28%29%2A%27%22+%2B%2C%3B-._%7E%26%24%3C%3E%7C%7B%7D%25%5C%5E%60%21%3Ffoo%3Dbar%23id',
-            $this->getGenerator($routes)->generate('test', array(
-                'varpath' => $chars,
-                'query' => $chars,
-            ))
-        );
+        $this->assertSame($expectedPath, $this->getGenerator($routes)->generate('test', array(
+            'varpath' => $chars,
+            'query' => $chars,
+        )));
     }
 
     public function testEncodingOfRelativePathSegments()