diff --git a/benches/read_metadata.rs b/benches/read_metadata.rs
index 999ca426..ed6fa853 100644
--- a/benches/read_metadata.rs
+++ b/benches/read_metadata.rs
@@ -59,7 +59,7 @@ fn generate_zip32_archive_with_random_comment(comment_length: usize) -> ZipResul
 fn parse_archive_with_comment(bench: &mut Bencher) {
     let bytes = generate_zip32_archive_with_random_comment(COMMENT_SIZE).unwrap();
 
-    bench.bench_n(1, || {
+    bench.bench_n(1, |_| {
         let archive = ZipArchive::new(Cursor::new(bytes.as_slice())).unwrap();
         archive.comment().len()
     });