diff --git a/src/Client.php b/src/Client.php
index fa6538e..9b95a08 100644
--- a/src/Client.php
+++ b/src/Client.php
@@ -234,7 +234,7 @@ public function upload(string $uri, array $files = [], array $form = [], array $
         $multipart = [];
 
         foreach ($files as $name => $contents) {
-            $contents = \is_resource($contents) ?: \fopen($contents, 'r');
+            $contents = \is_resource($contents) ? $contents : \fopen($contents, 'r');
             $multipart[] = \compact('name', 'contents');
         }