diff --git a/src/read/stream.rs b/src/read/stream.rs
index 6c1c66c9..2e47396a 100644
--- a/src/read/stream.rs
+++ b/src/read/stream.rs
@@ -80,6 +80,7 @@ impl<R: Read> ZipStreamReader<R> {
                 Ok(())
             }
 
+            #[allow(unused)]
             fn visit_additional_metadata(
                 &mut self,
                 metadata: &ZipStreamFileMetadata,