diff --git a/include/mail.php b/include/mail.php
index 4eb165c..6912cae 100644
--- a/include/mail.php
+++ b/include/mail.php
@@ -15,7 +15,7 @@ class Mail extends Mailhandling {
         }
         $params = $this->getUriParams();
         $this->uid = $params['uid'];
-        $this->folder = url_decode($params['folder']);
+        $this->folder = urldecode($params['folder']);
         $this->content['uid'] = $this->uid;
     }