diff --git a/libraries.drush.inc b/libraries.drush.inc
index ef379a4..e77446c 100644
--- a/libraries.drush.inc
+++ b/libraries.drush.inc
@@ -124,6 +124,7 @@ function libraries_drush_download($name) {
   $file_list = drush_tarball_extract($path, $temporary_base, TRUE);
 
   // Move untarred directory to a directory with the same name as the library's machine name.
+  $file_list = array_values($file_list);
   $library_dir = drush_trim_path($file_list[0]);
   if ($library_dir !== $library['machine name']) {
     drush_move_dir($temporary_base . DIRECTORY_SEPARATOR . $library_dir, $temporary_base . DIRECTORY_SEPARATOR . $library['machine name']);