diff --git a/crates/librqbit/src/chunk_tracker.rs b/crates/librqbit/src/chunk_tracker.rs
index 47c306d..c013588 100644
--- a/crates/librqbit/src/chunk_tracker.rs
+++ b/crates/librqbit/src/chunk_tracker.rs
@@ -59,7 +59,7 @@ impl ChunkTracker {
     pub fn new(needed_pieces: BF, have_pieces: BF, lengths: Lengths) -> Self {
         // TODO: ideally this needs to be a list based on needed files, e.g.
         // last needed piece for each file. But let's keep simple for now.
-        let last_needed_piece_id = needed_pieces.iter_ones().rev().next();
+        let last_needed_piece_id = needed_pieces.iter_ones().next_back();
 
         // The last pieces first. Often important information is stored in the last piece.
         // E.g. if it's a video file, than the last piece often contains some index, or just