diff --git a/src/client.rs b/src/client.rs
index b5419be..4938488 100644
--- a/src/client.rs
+++ b/src/client.rs
@@ -35,7 +35,7 @@ pub async fn client_mode(client_config: ClientConfiguration, fd: i32) {
     let (tx, rx) = unbounded::<Vec<u8>>();
     let (dx, mx) = unbounded::<Vec<u8>>();
 
-    let cipher_shared = Arc::new(Mutex::new(None));
+    let cipher_shared: Arc<Mutex<Option<x25519_dalek::SharedSecret>>> = Arc::new(Mutex::new(None));
 
     tokio::spawn(async move {
         while let Ok(bytes) = rx.recv() {