diff --git a/src/Ssh/Sftp.php b/src/Ssh/Sftp.php
index e19767c..a5d3e44 100644
--- a/src/Ssh/Sftp.php
+++ b/src/Ssh/Sftp.php
@@ -202,7 +202,7 @@ public function send($local, $distant)
      */
     public function getUrl($filename)
     {
-        return sprintf('ssh2.sftp://%s/%s', $this->getResource(), $filename);
+        return sprintf('ssh2.sftp://%s/%s', (int) $this->getResource(), $filename);
     }
 
     /**