diff --git a/core/modules/config/config.module b/core/modules/config/config.module
index f58dff9..abc843e 100644
--- a/core/modules/config/config.module
+++ b/core/modules/config/config.module
@@ -65,8 +65,13 @@ function config_file_download($uri) {
   $scheme = file_uri_scheme($uri);
   $target = file_uri_target($uri);
   if ($scheme == 'temporary' && $target == 'config.tar.gz') {
+    $date = new DateTime();
+    $date_string = $date->format('Y-m-d-H-i-s');
+    $hostname = str_replace('.', '-', $_SERVER['HTTP_HOST']);
+    $filename = 'config' . '-' . $hostname . '-' . $date_string. '.tar.gz';
+    $disposition = 'attachment; filename=' . $filename;
     return array(
-      'Content-disposition' => 'attachment; filename="config.tar.gz"',
+      'Content-disposition' => $disposition,
     );
   }
 }