diff --git a/module/fid/src/Controller/UserController.php b/module/fid/src/Controller/UserController.php
index 583842cedfbb49002b484297cbaad6968aabd845..63f3a72afa7cbd2a6d99a7432a5f305f4df3347e 100644
--- a/module/fid/src/Controller/UserController.php
+++ b/module/fid/src/Controller/UserController.php
@@ -33,16 +33,14 @@ use fid\Service\UserNotAuthorizedException;
 use VuFind\Auth\Manager as AuthManager;
 use VuFind\Controller\AbstractBase;
 use VuFind\Exception\Auth as AuthException;
-use Zend\Form\Element\Checkbox;
-use Zend\Form\Element\Radio;
 use Zend\Form\Element\Select;
 use Zend\Form\Form;
 use Zend\Http\PhpEnvironment\Request;
+use Zend\Http\PhpEnvironment\Response as HttpResponse;
 use Zend\Http\Response;
 use Zend\Mvc\Plugin\FlashMessenger\FlashMessenger;
 use Zend\ServiceManager\ServiceLocatorInterface;
 use Zend\View\Model\ViewModel;
-use Zend\Http\PhpEnvironment\Response as HttpResponse;
 
 class UserController extends AbstractBase
 {
@@ -771,10 +769,11 @@ class UserController extends AbstractBase
         $response->getHeaders()->addHeaders(
             [
                 'Content-type' => 'text/plain',
-                'Content-Disposition' => 'attachment; filename="'.$prefix.'_'.date('Ymd_His').'.csv"'
+                'Content-Disposition' => 'attachment; filename="'.$prefix.'_'.date('Ymd_His').'.txt"'
             ]
         );
         $output = implode("\t",$fields)."\n";
+        /** @var  User $user */
         foreach ($userList as $user) {
             $output .= $user->export($fields)."\n";
         }