diff --git a/library/includes/functions_torrent.php b/library/includes/functions_torrent.php
index 890841f8..e91bc6bc 100644
--- a/library/includes/functions_torrent.php
+++ b/library/includes/functions_torrent.php
@@ -326,9 +326,13 @@ 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'];
+				$totallen += (isset($f['length']) && is_numeric($f['length'])) ? (float) $f['length'] : 'invalid_size';
 			}
 		}
+		if ($totallen === 'invalid_size')
+		{
+			torrent_error_exit($lang['TORFILE_INVALID']);
+		}
 	}
 	else
 	{