diff --git a/vfio_user/src/lib.rs b/vfio_user/src/lib.rs
index d49721e2b..2b5ab4162 100644
--- a/vfio_user/src/lib.rs
+++ b/vfio_user/src/lib.rs
@@ -410,7 +410,7 @@ impl Client {
             .write_all(dma_unmap.as_slice())
             .map_err(Error::StreamWrite)?;
 
-        let mut reply = Header::default();
+        let mut reply = DmaUnmap::default();
         self.stream
             .read_exact(reply.as_mut_slice())
             .map_err(Error::StreamRead)?;