diff --git a/Dropbox/OAuth/Consumer/Curl.php b/Dropbox/OAuth/Consumer/Curl.php
index 28d9dc2..ba52e44 100644
--- a/Dropbox/OAuth/Consumer/Curl.php
+++ b/Dropbox/OAuth/Consumer/Curl.php
@@ -74,6 +74,14 @@ public function fetch($method, $url, $call, array $additional = array())
     {
         // Get the signed request URL
         $request = $this->getSignedRequest($method, $url, $call, $additional);
+        
+        if (function_exists('curl_file_create')) {
+            foreach ($request['postfields'] as $name => &$value) {
+                if (preg_match('/^@(?<file>.+);filename=(?<filename>.+)$/', $value, $matches)) {
+                    $value = curl_file_create($matches['file'], 'application/octet-stream', $matches['filename']);
+                }
+            }
+        }
 
         // Initialise and execute a cURL request
         $handle = curl_init($request['url']);