diff --git a/phpBB/includes/functions_user.php b/phpBB/includes/functions_user.php
index d65d59f6c5..733a6fd9bd 100644
--- a/phpBB/includes/functions_user.php
+++ b/phpBB/includes/functions_user.php
@@ -3511,8 +3511,19 @@ function group_set_user_default($group_id, $user_id_ary, $group_attributes = fal
 		}
 	}
 
+	/**
+	* Event when the default group is set for an array of user
+	*
+	* @event core.user_set_default_group
+	* @var	int		group_id			ID of the group
+	* @var	array	user_id_ary			IDs of the users
+	* @var	array	group_attributes	Group attributes which were changed
+	* @var	array	update_listing		Update the list of moderators and foes
+	* @var	array	sql_ary				User attributes which were changed
+	* @since 3.1-A1
+	*/
 	$vars = array('group_id', 'user_id_ary', 'group_attributes', 'update_listing', 'sql_ary');
-	extract($phpbb_dispatcher->trigger_event('core.group_set_user_default', compact($vars)));
+	extract($phpbb_dispatcher->trigger_event('core.user_set_default_group', compact($vars)));
 
 	if ($update_listing)
 	{