diff --git a/app/functions/fn.fs.php b/app/functions/fn.fs.php
index d1aeec1..50a6e4a 100644
--- a/app/functions/fn.fs.php
+++ b/app/functions/fn.fs.php
@@ -1420,11 +1420,9 @@ function fn_get_public_files_path()
  */
 function fn_get_rel_dir($dir)
 {
-    return str_replace(
-        rtrim(Registry::get('config.dir.root'), '\\/') . '/',
-        '',
-        $dir
-    );
+    $dir = str_replace(Registry::get('config.dir.root') . '/', '', $dir);
+
+    return $dir;
 }
 
 /**