 #include <IRrecv.h>
 #include <IRsend.h>
 #include <IRutils.h>
-#ifdef MQTT_ENABLE
+#if MQTT_ENABLE
 // --------------------------------------------------------------------
 // * * * IMPORTANT * * *
 // You must change <PubSubClient.h> to have the following value.

 *     # Install a MQTT client
 *     $ sudo apt install mosquitto-clients
 *     # Send a 32-bit NEC code of 0x1234abcd via MQTT.
 *     $ mosquitto_pub -h 10.20.0.253 -t ir_server/send -m '3,1234abcd,32'
 *
 * This server will send (back) what ever IR message it just transmitted to
 * the MQTT topic 'ir_server/sent' to confirm it has been performed. This works

      " <input type='submit' value='Send A/C State'>"
    "</form>"
    "<br><hr>"
#if FIRMWARE_OTA_ENABLE
    "<h3>Update IR Server firmware</h3><p>"
    "<b><mark>Warning:</mark></b><br> "
    "<i>Updating your firmware may screw up your access to the device. "
