diff --git a/include/zenoh-pico/api/primitives.h b/include/zenoh-pico/api/primitives.h
index 6ff5c4b63..8daea5659 100644
--- a/include/zenoh-pico/api/primitives.h
+++ b/include/zenoh-pico/api/primitives.h
@@ -1404,6 +1404,7 @@ const z_loaned_encoding_t *z_sample_encoding(const z_loaned_sample_t *sample);
  */
 z_sample_kind_t z_sample_kind(const z_loaned_sample_t *sample);
 
+#ifdef Z_FEATURE_UNSTABLE_API
 /**
  * Gets the reliability a sample was received with (unstable).
  *
@@ -1413,7 +1414,6 @@ z_sample_kind_t z_sample_kind(const z_loaned_sample_t *sample);
  * Return:
  *   The reliability wrapped as a :c:type:`z_reliability_t`.
  */
-#ifdef Z_FEATURE_UNSTABLE_API
 z_reliability_t z_sample_reliability(const z_loaned_sample_t *sample);
 #endif
 
@@ -2124,13 +2124,13 @@ void z_scout_options_default(z_scout_options_t *options);
  */
 z_result_t zp_send_join(const z_loaned_session_t *zs, const zp_send_join_options_t *options);
 
+#ifdef Z_FEATURE_UNSTABLE_API
 /**
  * Gets the default reliability value (unstable).
  *
  * Return:
  *   The reliability wrapped as a :c:type:`z_reliability_t`.
  */
-#ifdef Z_FEATURE_UNSTABLE_API
 z_reliability_t z_reliability_default(void);
 #endif