torrent.go | 2 +-

diff --git a/torrent.go b/torrent.go
index 8b4745218864d81bb19ffda48140aa245f4cc044..6385a3fc026f9a2474ddc029908ef236ab30713a 100644
--- a/torrent.go
+++ b/torrent.go
@@ -2143,7 +2143,7 @@ 			p.Flush() // You can be synchronous here!
 		}
 		err := p.Storage().MarkComplete()
 		if err != nil {
-			t.logger.Printf("%T: error marking piece complete %d: %s", t.storage, piece, err)
+			t.logger.Levelf(log.Warning, "%T: error marking piece complete %d: %s", t.storage, piece, err)
 		}
 		t.cl.lock()