diff --git a/src/mqtt/hasp_mqtt.h b/src/mqtt/hasp_mqtt.h
index 52e08715..8f090bba 100644
--- a/src/mqtt/hasp_mqtt.h
+++ b/src/mqtt/hasp_mqtt.h
@@ -11,6 +11,11 @@
 // #define __FlashStringHelper char
 // #endif
 
+#ifdef ARDUINO
+#include "PubSubClient.h"
+extern PubSubClient mqttClient;
+#endif
+
 typedef enum {
     MQTT_ERR_OK       = 0,
     MQTT_ERR_DISABLED = -1,
@@ -51,6 +56,10 @@ bool mqttSetConfig(const JsonObject& settings);
 #define MQTT_TOPIC_COMMAND "command"
 #endif
 
+#ifndef MQTT_TOPIC_CONFIG
+#define MQTT_TOPIC_CONFIG "config"
+#endif
+
 #ifndef MQTT_TOPIC_DISCOVERY
 #define MQTT_TOPIC_DISCOVERY "discovery"
 #endif