diff --git a/src/Symfony/Component/DomCrawler/Form.php b/src/Symfony/Component/DomCrawler/Form.php
index 339603d09e..8bdd364347 100644
--- a/src/Symfony/Component/DomCrawler/Form.php
+++ b/src/Symfony/Component/DomCrawler/Form.php
@@ -44,7 +44,7 @@ class Form extends Link implements \ArrayAccess
      *
      * @throws \LogicException if the node is not a button inside a form tag
      */
-    public function __construct(\DOMElement $node, string $currentUri, string $method = null, string $baseHref = null)
+    public function __construct(\DOMElement $node, string $currentUri = null, string $method = null, string $baseHref = null)
     {
         parent::__construct($node, $currentUri, $method);
         $this->baseHref = $baseHref;
diff --git a/src/Symfony/Component/DomCrawler/Tests/CrawlerTest.php b/src/Symfony/Component/DomCrawler/Tests/CrawlerTest.php
index c3b40f3226..548fd1833f 100644
--- a/src/Symfony/Component/DomCrawler/Tests/CrawlerTest.php
+++ b/src/Symfony/Component/DomCrawler/Tests/CrawlerTest.php
@@ -1091,6 +1091,7 @@ HTML;
             ['/basepath', '/registration', 'http://domain.com/registration', 'http://domain.com/registration', '<base> tag does work with a path and form action'],
             ['/basepath', '', 'http://domain.com/registration', 'http://domain.com/registration', '<base> tag does work with a path and empty form action'],
             ['http://base.com/', '/registration', 'http://base.com/registration', 'http://domain.com/registration', '<base> tag does work with a URL and form action'],
+            ['http://base.com/', 'http://base.com/registration', 'http://base.com/registration', null, '<base> tag does work with a URL and form action'],
             ['http://base.com', '', 'http://domain.com/path/form', 'http://domain.com/path/form', '<base> tag does work with a URL and an empty form action'],
             ['http://base.com/path', '/registration', 'http://base.com/registration', 'http://domain.com/path/form', '<base> tag does work with a URL and form action'],
         ];