diff --git a/plugins/zenoh-backend-traits/Cargo.toml b/plugins/zenoh-backend-traits/Cargo.toml
index f2b8a4a1eb..b3926ab955 100644
--- a/plugins/zenoh-backend-traits/Cargo.toml
+++ b/plugins/zenoh-backend-traits/Cargo.toml
@@ -31,7 +31,7 @@ async-std = { workspace = true, features = ["default"] }
 async-trait = { workspace = true }
 derive_more = { workspace = true }
 serde_json = { workspace = true }
-zenoh = { workspace = true }
+zenoh = { workspace = true, features = ["unstable"] }
 zenoh-result = { workspace = true }
 zenoh-util = { workspace = true }
 schemars = { workspace = true }
diff --git a/zenoh/src/queryable.rs b/zenoh/src/queryable.rs
index 7b9fc61e8c..93a780c8c6 100644
--- a/zenoh/src/queryable.rs
+++ b/zenoh/src/queryable.rs
@@ -111,6 +111,8 @@ impl Query {
     /// replying on a disjoint key expression will result in an error when resolving the reply.
     /// This api is for internal use only.
     #[inline(always)]
+    #[cfg(feature = "unstable")]
+    #[doc(hidden)]
     pub fn reply_sample(&self, sample: Sample) -> ReplyBuilder<'_> {
         let Sample {
             key_expr,