diff --git a/authfs/src/main.rs b/authfs/src/main.rs
index e004b81..c85d801 100644
--- a/authfs/src/main.rs
+++ b/authfs/src/main.rs
@@ -55,7 +55,7 @@
 
     /// CID of the VM where the service runs.
     #[structopt(long)]
-    cid: Option<u32>,
+    cid: u32,
 
     /// Extra options to FUSE
     #[structopt(short = "o")]
@@ -275,7 +275,7 @@
     let mut file_pool = BTreeMap::new();
 
     if args.has_remote_files() {
-        let service = file::get_binder_service(args.cid)?;
+        let service = file::get_rpc_binder_service(args.cid)?;
 
         for config in &args.remote_ro_file {
             file_pool.insert(