diff --git a/components/network/libemqtt/luat_mqtt_client.c b/components/network/libemqtt/luat_mqtt_client.c
index bf794abb..6378a00f 100644
--- a/components/network/libemqtt/luat_mqtt_client.c
+++ b/components/network/libemqtt/luat_mqtt_client.c
@@ -288,9 +288,9 @@ static int luat_mqtt_msg_cb(luat_mqtt_ctrl_t *mqtt_ctrl) {
         }
         case MQTT_MSG_PUBLISH : {
 			LLOGD("MQTT_MSG_PUBLISH");
+			qos = MQTTParseMessageQos(mqtt_ctrl->mqtt_packet_buffer);
 #ifdef __LUATOS__
 			const uint8_t* ptr;
-			qos = MQTTParseMessageQos(mqtt_ctrl->mqtt_packet_buffer);
 			uint16_t topic_len = mqtt_parse_pub_topic_ptr(mqtt_ctrl->mqtt_packet_buffer, &ptr);
 			uint16_t payload_len = mqtt_parse_pub_msg_ptr(mqtt_ctrl->mqtt_packet_buffer, &ptr);
 			luat_mqtt_msg_t *mqtt_msg = (luat_mqtt_msg_t *)luat_heap_malloc(sizeof(luat_mqtt_msg_t)+topic_len+payload_len);