diff --git a/src/protocols/MQTT/MQTT.cpp b/src/protocols/MQTT/MQTT.cpp
index 92583cbb..cc561157 100644
--- a/src/protocols/MQTT/MQTT.cpp
+++ b/src/protocols/MQTT/MQTT.cpp
@@ -1,4 +1,5 @@
 #include "MQTT.h"
+#if !defined(RADIOLIB_EXCLUDE_MQTT)
 
 MQTTClient::MQTTClient(TransportLayer* tl, uint16_t port) {
   _tl = tl;
@@ -469,3 +470,5 @@ uint32_t MQTTClient::decodeLength(uint8_t* encoded) {
   } while((encoded[i] & 128) != 0);
   return len;
 }
+
+#endif
diff --git a/src/protocols/MQTT/MQTT.h b/src/protocols/MQTT/MQTT.h
index b7a94bdb..efc40d3a 100644
--- a/src/protocols/MQTT/MQTT.h
+++ b/src/protocols/MQTT/MQTT.h
@@ -1,4 +1,4 @@
-#ifndef _RADIOLIB_MQTT_H
+#if !defined(_RADIOLIB_MQTT_H) && !defined(RADIOLIB_EXCLUDE_MQTT)
 #define _RADIOLIB_MQTT_H
 
 #include "../../TypeDef.h"