diff --git a/addressbook/inc/class.addressbook_hooks.inc.php b/addressbook/inc/class.addressbook_hooks.inc.php
index 75f23f8e50..fb6257dd2d 100644
--- a/addressbook/inc/class.addressbook_hooks.inc.php
+++ b/addressbook/inc/class.addressbook_hooks.inc.php
@@ -257,7 +257,7 @@ class addressbook_hooks
 				'name'   => 'default_document',
 				'help'   => lang('If you specify a document (full vfs path) here, addressbook displays an extra document icon for each address. That icon allows to download the specified document with the contact data inserted.').' '.
 					lang('The document can contain placeholder like {{n_fn}}, to be replaced with the contact data (%1full list of placeholder names%2).','<a href="'.$link.'" target="_blank">','</a>').' '.
-					lang('At the moment the following document-types are supported:').'*.rtf, *.txt',
+					lang('At the moment the following document-types are supported:'). implode(',',bo_merge::get_file_extensions()),
 				'run_lang' => false,
 				'xmlrpc' => True,
 				'admin'  => False,
@@ -269,7 +269,7 @@ class addressbook_hooks
 				'name'   => 'document_dir',
 				'help'   => lang('If you specify a directory (full vfs path) here, addressbook displays an action for each document. That action allows to download the specified document with the contact data inserted.').' '.
 					lang('The document can contain placeholder like {{n_fn}}, to be replaced with the contact data (%1full list of placeholder names%2).','<a href="'.$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,