diff --git a/library/includes/functions_torrent.php b/library/includes/functions_torrent.php
index 890841f8..de4775c6 100644
--- a/library/includes/functions_torrent.php
+++ b/library/includes/functions_torrent.php
@@ -326,7 +326,14 @@ function tracker_register ($attach_id, $mode = '', $tor_status = TOR_NOT_APPROVE
 			// Exclude padding files [Only for hybrid torrents]
 			if ((isset($f['attr']) ? $f['attr'] : null) !== 'p')
 			{
-				$totallen += (float) $f['length'];
+				if (isset($f['length']) && is_numeric($f['length']))
+				{
+					$totallen += (float) $f['length'];
+				}
+				else
+				{
+					torrent_error_exit($lang['TORFILE_INVALID']);
+				}
 			}
 		}
 	}