diff --git a/timesheet/inc/class.timesheet_hooks.inc.php b/timesheet/inc/class.timesheet_hooks.inc.php
index 8919b6cd4a..a2fc233e74 100644
--- a/timesheet/inc/class.timesheet_hooks.inc.php
+++ b/timesheet/inc/class.timesheet_hooks.inc.php
@@ -174,7 +174,7 @@ class timesheet_hooks
 				'name'   => 'default_document',
 				'help'   => lang('If you specify a document (full vfs path) here, %1 displays an extra document icon for each entry. That icon allows to download the specified document with the contact data inserted.','timesheet').' '.
 					lang('The document can contain placeholder like {{ts_title}}, to be replaced with the contact data (%1full list of placeholder names%2).','<a href="'.$link.'" target="_blank">','</a>').' '.
-					lang('At the moment the following document-types are supported:').'*.rtf, *.txt',
+					lang('At the moment the following document-types are supported:'). implode(',',bo_merge::get_file_extensions()),
 				'run_lang' => false,
 				'xmlrpc' => True,
 				'admin'  => False,
@@ -186,7 +186,7 @@ class timesheet_hooks
 				'name'   => 'document_dir',
 				'help'   => lang('If you specify a directory (full vfs path) here, eGroupWare displays an action for each document. That action allows to download the specified document with the %1 data inserted.', lang('timesheet')).' '.
 					lang('The document can contain placeholder like {{ts_title}}, to be replaced with the contact data (%1full list of placeholder names%2).','<a href="'.$link.'" target="_blank">','</a>').' '.
-					lang('At the moment the following document-types are supported:').'*.rtf, *.txt',
+					lang('At the moment the following document-types are supported:'). implode(',',bo_merge::get_file_extensions()),
 				'run_lang' => false,
 				'xmlrpc' => True,
 				'admin'  => False,