diff --git a/src/Symfony/Component/BrowserKit/HttpBrowser.php b/src/Symfony/Component/BrowserKit/HttpBrowser.php
index 6f5749c264..0ad87b5c33 100644
--- a/src/Symfony/Component/BrowserKit/HttpBrowser.php
+++ b/src/Symfony/Component/BrowserKit/HttpBrowser.php
@@ -94,7 +94,7 @@ class HttpBrowser extends AbstractBrowser
         return [http_build_query($fields, '', '&', \PHP_QUERY_RFC1738), ['Content-Type' => 'application/x-www-form-urlencoded']];
     }
 
-    private function getHeaders(Request $request): array
+    protected function getHeaders(Request $request): array
     {
         $headers = [];
         foreach ($request->getServer() as $key => $value) {