diff --git a/admin/includes/actions/backup/delete_confirm.php b/admin/includes/actions/backup/delete_confirm.php
index c9adfffe4..b30b5bce3 100644
--- a/admin/includes/actions/backup/delete_confirm.php
+++ b/admin/includes/actions/backup/delete_confirm.php
@@ -10,7 +10,7 @@
   Released under the GNU General Public License
 */
 
-  $source = realpath(DIR_FS_BACKUP . $_GET['file']);
+  $source = Path::normalize(DIR_FS_BACKUP . $_GET['file']);
   if (Text::is_prefixed_by($source, DIR_FS_BACKUP) && Path::remove($source)) {
     $messageStack->add_session(SUCCESS_BACKUP_DELETED, 'success');