diff --git a/vm-virtio/src/device.rs b/vm-virtio/src/device.rs
index 27d22d51d..a5d7699f8 100644
--- a/vm-virtio/src/device.rs
+++ b/vm-virtio/src/device.rs
@@ -6,7 +6,7 @@
 //
 // SPDX-License-Identifier: Apache-2.0 AND BSD-3-Clause
 
-use super::*;
+use crate::{ActivateResult, Error, Queue};
 use std::sync::Arc;
 use vm_memory::{GuestAddress, GuestMemoryAtomic, GuestMemoryMmap, GuestUsize};
 use vmm_sys_util::eventfd::EventFd;
@@ -106,6 +106,10 @@ pub trait VirtioDevice: Send {
     /// every device as part of shutting down the VM. Acting on the device
     /// after a shutdown() can lead to unpredictable results.
     fn shutdown(&mut self) {}
+
+    fn update_memory(&mut self, _mem: &GuestMemoryMmap) -> std::result::Result<(), Error> {
+        Ok(())
+    }
 }
 
 /// Trait providing address translation the same way a physical DMA remapping
diff --git a/vm-virtio/src/lib.rs b/vm-virtio/src/lib.rs
index 7d0bb2794..b96ced73a 100755
--- a/vm-virtio/src/lib.rs
+++ b/vm-virtio/src/lib.rs
@@ -175,4 +175,5 @@ pub enum Error {
     EpollCtl(io::Error),
     EpollWait(io::Error),
     FailedSignalingDriver(io::Error),
+    VhostUserUpdateMemory(vhost_user::Error),
 }