diff --git a/src/polyfill.php b/src/polyfill.php
index a27daf1f7..084ae6ee3 100644
--- a/src/polyfill.php
+++ b/src/polyfill.php
@@ -8,6 +8,11 @@ if (defined('MADELINE_POLYFILLED')) {
 
 define('MADELINE_POLYFILLED', true);
 
+use Amp\Http\Client\Cookie\InMemoryCookieJar;
+use Amp\Http\Client\Cookie\LocalCookieJar;
+use Amp\Socket\EncryptableSocket;
+use Amp\Socket\ResourceSocket;
+
 $ampFilePolyfill = 'namespace Amp\\File {';
 foreach ([
     'open' => 'openFile',