diff --git a/filemanager/inc/class.filemanager_ui.inc.php b/filemanager/inc/class.filemanager_ui.inc.php
index 5f3b42932e..0731a4e143 100644
--- a/filemanager/inc/class.filemanager_ui.inc.php
+++ b/filemanager/inc/class.filemanager_ui.inc.php
@@ -656,7 +656,9 @@ class filemanager_ui
 								$msg .= lang('Renamed %1 to %2.',$path,$to).' ';
 								$content['old']['name'] = $content[$name];
 								$path = $to;
-								$content['mime'] = mime_magic::filename2mime($path);    // recheck mime type
+								$mime_magic = new mime_magic();
+								$content['mime'] = $mime_magic->filename2mime($path);    // recheck mime type
+								unset($mime_magic);
 							}
 							else
 							{