diff --git a/phpBB/includes/ucp/ucp_pm_compose.php b/phpBB/includes/ucp/ucp_pm_compose.php
index 3ae2abbce2..0458135e03 100644
--- a/phpBB/includes/ucp/ucp_pm_compose.php
+++ b/phpBB/includes/ucp/ucp_pm_compose.php
@@ -241,6 +241,13 @@ function compose_pm($id, $mode, $action, $user_folders = array())
 		* @var	array	forum_list				List of forums that contain the posts
 		* @var	int		visibility_const		Integer with one of the possible ITEM_* constant values
 		* @var	int		topic_id				topic_id in the page request
+		* @var	int		to_user_id				The id of whom the message is to
+		* @var	int		to_group_id				The id of the group whom the message is to
+		* @var	bool	submit					Whether the user is sending the PM or not
+		* @var	bool	preview					Whether the user is previewing the PM or not
+		* @var	bool	action					One of: post, reply, quote, forward, quotepost, edit, delete, smilies
+		* @var	bool	delete					If deleting message
+		* @var	int		reply_to_all			Value of reply_to_all request variable.
 		* @var	string	limit_time_sql			String with the SQL code to limit the time interval of the post (Note: May be empty string)
 		* @var	string	sort_order_sql			String with the ORDER BY SQL code used in this query
 		* @since 3.1.0-RC4
@@ -250,6 +257,13 @@ function compose_pm($id, $mode, $action, $user_folders = array())
 			'forum_list',
 			'visibility_const',
 			'topic_id',
+			'to_user_id',
+			'to_group_id',
+			'submit',
+			'preview',
+			'action',
+			'delete',
+			'reply_to_all',
 			'limit_time_sql',
 			'sort_order_sql',
 		);