diff --git a/DCCRMT.cpp b/DCCRMT.cpp
index a561917..294663b 100644
--- a/DCCRMT.cpp
+++ b/DCCRMT.cpp
@@ -19,6 +19,7 @@
 
 #include "config.h"
 #include "defines.h"
+#if defined(ARDUINO_ARCH_ESP32)
 #include "DIAG.h"
 #include "DCCRMT.h"
 #include "DCCWaveform.h" // for MAX_PACKET_SIZE
@@ -166,3 +167,4 @@ void IRAM_ATTR RMTPin::RMTinterrupt() {
     dataRepeat--;
   return;
 }
+#endif //ESP32
diff --git a/DCCRMT.h b/DCCRMT.h
index bd235b7..078a652 100644
--- a/DCCRMT.h
+++ b/DCCRMT.h
@@ -19,6 +19,7 @@
 
 #pragma once
 #include <Arduino.h>
+#if defined(ARDUINO_ARCH_ESP32)
 #include "driver/rmt.h"
 #include "soc/rmt_reg.h"
 #include "soc/rmt_struct.h"
@@ -55,3 +56,4 @@ class RMTPin {
   volatile bool dataReady = false;    // do we have real data available or send idle
   volatile byte dataRepeat = 0;
 };
+#endif //ESP32