diff --git a/virtio-devices/src/vsock/device.rs b/virtio-devices/src/vsock/device.rs
index b0d425ec3..fa793295c 100644
--- a/virtio-devices/src/vsock/device.rs
+++ b/virtio-devices/src/vsock/device.rs
@@ -333,7 +333,7 @@ impl VersionMapped for VsockState {}
 
 impl<B> Vsock<B>
 where
-    B: VsockBackend,
+    B: VsockBackend + Sync,
 {
     /// Create a new virtio-vsock device with the given VM CID and vsock
     /// backend.
diff --git a/vmm/src/lib.rs b/vmm/src/lib.rs
index 407e590fd..264037a9d 100644
--- a/vmm/src/lib.rs
+++ b/vmm/src/lib.rs
@@ -43,6 +43,7 @@ use std::os::unix::net::UnixListener;
 use std::os::unix::net::UnixStream;
 use std::panic::AssertUnwindSafe;
 use std::path::PathBuf;
+use std::rc::Rc;
 use std::sync::mpsc::{Receiver, RecvError, SendError, Sender};
 use std::sync::{Arc, Mutex};
 use std::time::Instant;
@@ -347,9 +348,9 @@ pub fn start_vmm_thread(
                 vmm.setup_signal_handler()?;
 
                 vmm.control_loop(
-                    Arc::new(api_receiver),
+                    Rc::new(api_receiver),
                     #[cfg(feature = "guest_debug")]
-                    Arc::new(gdb_receiver),
+                    Rc::new(gdb_receiver),
                 )
             })
             .map_err(Error::VmmThreadSpawn)?
@@ -1791,8 +1792,8 @@ impl Vmm {
 
     fn control_loop(
         &mut self,
-        api_receiver: Arc<Receiver<ApiRequest>>,
-        #[cfg(feature = "guest_debug")] gdb_receiver: Arc<Receiver<gdb::GdbRequest>>,
+        api_receiver: Rc<Receiver<ApiRequest>>,
+        #[cfg(feature = "guest_debug")] gdb_receiver: Rc<Receiver<gdb::GdbRequest>>,
     ) -> Result<()> {
         const EPOLL_EVENTS_LEN: usize = 100;