diff --git a/phpBB/includes/acp/acp_logs.php b/phpBB/includes/acp/acp_logs.php
index 567606cfc7..d1e8b6d9c4 100644
--- a/phpBB/includes/acp/acp_logs.php
+++ b/phpBB/includes/acp/acp_logs.php
@@ -33,6 +33,7 @@ class acp_logs
 		// Set up general vars
 		$action		= request_var('action', '');
 		$forum_id	= request_var('f', 0);
+		$topic_id	= request_var('t', 0);
 		$start		= request_var('start', 0);
 		$deletemark = (!empty($_POST['delmarked'])) ? true : false;
 		$deleteall	= (!empty($_POST['delall'])) ? true : false;