diff --git a/block/src/qcow/qcow_raw_file.rs b/block/src/qcow/qcow_raw_file.rs
index 1d9dbc0b5..18a1c771e 100644
--- a/block/src/qcow/qcow_raw_file.rs
+++ b/block/src/qcow/qcow_raw_file.rs
@@ -102,6 +102,7 @@ impl QcowRawFile {
         for count in table {
             buffer.write_u16::<BigEndian>(*count)?;
         }
+        buffer.flush()?;
         Ok(())
     }