diff --git a/block/src/raw_sync.rs b/block/src/raw_sync.rs
index c045c5942..0051c1b67 100644
--- a/block/src/raw_sync.rs
+++ b/block/src/raw_sync.rs
@@ -15,6 +15,7 @@ use crate::async_io::{
 };
 use crate::{DiskTopology, SECTOR_SIZE, probe_sparse_support, query_device_size};
 
+#[derive(Debug)]
 pub struct RawFileDiskSync {
     file: File,
 }