diff --git a/include/zenoh-pico/api/types.h b/include/zenoh-pico/api/types.h
index 06117dd06..11dc18478 100644
--- a/include/zenoh-pico/api/types.h
+++ b/include/zenoh-pico/api/types.h
@@ -450,6 +450,7 @@ static inline z_qos_t z_qos_default(void) { return _Z_N_QOS_DEFAULT; }
  *   z_encoding_t encoding: The encoding of the value of this data sample.
  *   z_sample_kind_t kind: The kind of this data sample (PUT or DELETE).
  *   z_timestamp_t timestamp: The timestamp of this data sample.
+ *   z_qos_t qos: Quality of service settings used to deliver this sample.
  */
 typedef _z_sample_t z_sample_t;
 
diff --git a/include/zenoh-pico/protocol/definitions/network.h b/include/zenoh-pico/protocol/definitions/network.h
index 512ad2c8d..ce9c280f9 100644
--- a/include/zenoh-pico/protocol/definitions/network.h
+++ b/include/zenoh-pico/protocol/definitions/network.h
@@ -62,8 +62,9 @@ typedef _z_qos_t _z_n_qos_t;
 
 static inline _z_qos_t _z_n_qos_create(_Bool express, z_congestion_control_t congestion_control,
                                        z_priority_t priority) {
+    _z_n_qos_t ret;
     _Bool nodrop = congestion_control == Z_CONGESTION_CONTROL_DROP ? 0 : 1;
-    _z_n_qos_t ret = {._val = (uint8_t)((express << 4) | (nodrop << 3) | priority)};
+    ret._val = (uint8_t)((express << 4) | (nodrop << 3) | priority);
     return ret;
 }
 static inline z_priority_t _z_n_qos_get_priority(_z_n_qos_t n_qos) {