diff --git a/src/Symfony/Component/HttpClient/Response/ResponseTrait.php b/src/Symfony/Component/HttpClient/Response/ResponseTrait.php
index 7429547293..cc8c7b439f 100644
--- a/src/Symfony/Component/HttpClient/Response/ResponseTrait.php
+++ b/src/Symfony/Component/HttpClient/Response/ResponseTrait.php
@@ -13,6 +13,7 @@ namespace Symfony\Component\HttpClient\Response;
 
 use Symfony\Component\HttpClient\Chunk\DataChunk;
 use Symfony\Component\HttpClient\Chunk\ErrorChunk;
+use Symfony\Component\HttpClient\Chunk\FirstChunk;
 use Symfony\Component\HttpClient\Chunk\LastChunk;
 use Symfony\Component\HttpClient\Exception\ClientException;
 use Symfony\Component\HttpClient\Exception\JsonException;