diff --git a/code/espurna/config/arduino.h b/code/espurna/config/arduino.h
index 8c7d1bb2..a03dc4e1 100644
--- a/code/espurna/config/arduino.h
+++ b/code/espurna/config/arduino.h
@@ -52,6 +52,7 @@
 //#define DOMOTICZ_SUPPORT       0
 //#define DS18B20_SUPPORT        1
 //#define EMON_SUPPORT           1
+//#define HOMEASSISTANT_SUPPORT  0
 //#define I2C_SUPPORT            1
 //#define INFLUXDB_SUPPORT       0
 //#define MDNS_SUPPORT           0
diff --git a/code/espurna/homeassitant.ino b/code/espurna/homeassitant.ino
index ffca411e..49ecd6aa 100644
--- a/code/espurna/homeassitant.ino
+++ b/code/espurna/homeassitant.ino
@@ -8,6 +8,8 @@ Copyright (C) 2017 by Xose Pérez <xose dot perez at gmail dot com>
 
 #if HOMEASSISTANT_SUPPORT
 
+#include <ArduinoJson.h>
+
 void haSend() {
 
     DEBUG_MSG_P(PSTR("[HA] Sending autodiscovery MQTT message\n"));