diff --git a/zenoh-ext/src/querying_subscriber.rs b/zenoh-ext/src/querying_subscriber.rs
index 0f7e954204..e1eeb77bcc 100644
--- a/zenoh-ext/src/querying_subscriber.rs
+++ b/zenoh-ext/src/querying_subscriber.rs
@@ -20,7 +20,6 @@ use std::{
     time::{Duration, SystemTime, UNIX_EPOCH},
 };
 
-#[cfg(feature = "unstable")]
 use zenoh::{
     handlers::{locked, Callback, DefaultHandler, IntoHandler},
     internal::zlock,