diff --git a/phpBB/includes/notification/manager.php b/phpBB/includes/notification/manager.php
index 90916401c0..a5e1b09754 100644
--- a/phpBB/includes/notification/manager.php
+++ b/phpBB/includes/notification/manager.php
@@ -713,7 +713,7 @@ class phpbb_notification_manager
 	* is disabled so that all those notifications are hidden and do not
 	* cause errors
 	*
-	* @param string $item_type
+	* @param string $item_type Type identifier of the subscription
 	*/
 	public function disable_notifications($item_type)
 	{
@@ -729,7 +729,7 @@ class phpbb_notification_manager
 	* This should be called when an extension which has notification types
 	* is purged so that all those notifications are removed
 	*
-	* @param string $item_type
+	* @param string $item_type Type identifier of the subscription
 	*/
 	public function purge_notifications($item_type)
 	{
@@ -745,7 +745,7 @@ class phpbb_notification_manager
 	* that was disabled is re-enabled so that all those notifications that
 	* were hidden are shown again
 	*
-	* @param string $item_type
+	* @param string $item_type Type identifier of the subscription
 	*/
 	public function enable_notifications($item_type)
 	{
@@ -755,6 +755,18 @@ class phpbb_notification_manager
 		$this->db->sql_query($sql);
 	}
 
+	/**
+	* Delete all notifications older than a certain time
+	*
+	* @param int $timestamp Unix timestamp to delete all notifications that were created before
+	*/
+	public function prune_notifications($timestamp)
+	{
+		$sql = 'DELETE FROM ' . $this->notifications_table . '
+			WHERE time < ' . (int) $timestamp;
+		$this->db->sql_query($sql);
+	}
+
 	/**
 	* Helper to get the notifications item type class and set it up
 	*/