diff --git a/phpBB/includes/functions.php b/phpBB/includes/functions.php
index 53f48cb8a7..26b73e20fe 100644
--- a/phpBB/includes/functions.php
+++ b/phpBB/includes/functions.php
@@ -1314,8 +1314,6 @@ function markread($mode, $forum_id = false, $topic_id = false, $post_time = 0, $
 					WHERE user_id = {$user->data['user_id']}
 						AND mark_time < $post_time";
 				$db->sql_query($sql);
-
-				$user->data['user_lastmark'] = $post_time;
 			}
 			else if ($config['load_anon_lastread'] || $user->data['is_registered'])
 			{
@@ -1339,8 +1337,6 @@ function markread($mode, $forum_id = false, $topic_id = false, $post_time = 0, $
 						WHERE user_id = {$user->data['user_id']}
 							AND mark_time < $post_time";
 					$db->sql_query($sql);
-
-					$user->data['user_lastmark'] = $post_time;
 				}
 			}
 		}
@@ -1524,13 +1520,13 @@ function markread($mode, $forum_id = false, $topic_id = false, $post_time = 0, $
 
 				if ($user->data['is_registered'])
 				{
+					$user->data['user_lastmark'] = intval(base_convert(max($time_keys) + $config['board_startdate'], 36, 10));
+
 					$sql = 'UPDATE ' . USERS_TABLE . "
 						SET user_lastmark = $post_time
 						WHERE user_id = {$user->data['user_id']}
 							AND mark_time < $post_time";
 					$db->sql_query($sql);
-
-					$user->data['user_lastmark'] = $post_time;
 				}
 				else
 				{