diff --git a/core/src/core/classes/class.SystemTextEncoding.php b/core/src/core/classes/class.SystemTextEncoding.php
index 9d05fe5524..d08a8a06a2 100644
--- a/core/src/core/classes/class.SystemTextEncoding.php
+++ b/core/src/core/classes/class.SystemTextEncoding.php
@@ -124,7 +124,7 @@ public static function magicDequote($text)
      * @param string $filesystemElement
      * @return string
      */
-    public static function fromPostedFileName(&$filesystemElement)
+    public static function fromPostedFileName($filesystemElement)
     {
         return SystemTextEncoding::fromUTF8(SystemTextEncoding::magicDequote($filesystemElement));
     }