diff --git a/phpBB/mcp.php b/phpBB/mcp.php
index 39002632ff..95b700248e 100644
--- a/phpBB/mcp.php
+++ b/phpBB/mcp.php
@@ -434,10 +434,11 @@ switch($mode)
 	case 'lock':
 		$topics = (!empty($_POST['topic_id_list'])) ? $_POST['topic_id_list'] : array($topic_id);
 
-		$topic_id_sql = '';
+		$topic_id_sql = $log_data = '';
 		for($i = 0; $i < count($topics); $i++)
 		{
-			$topic_id_sql .= (($topic_id_sql != '') ? ', ' : '') . $topics[$i];
+			$topic_id_sql .= (($topic_id_sql != '') ? ', ' : '') . intval($topics[$i]);
+			$log_data = (($log_data != '') ? ', ' : '') . '<a href="viewtopic.'.$phpEx.'?t=' . intval($topics[$i]) . '">' . $topics[$i] . '</a>';
 		}
 
 		$sql = "UPDATE " . TOPICS_TABLE . "
@@ -446,6 +447,8 @@ switch($mode)
 				AND topic_moved_id = 0";
 		$db->sql_query($sql);
 
+		add_log('mod', $forum_id, 'logm_lock', $log_data);
+
 		if (!empty($topic_id))
 		{
 			$redirect_page = "viewtopic.$phpEx$SID&amp;t=$topic_id";