diff --git a/src/protocols/ExternalRadio/ExternalRadio.h b/src/protocols/ExternalRadio/ExternalRadio.h
index 2e222bab..0f721330 100644
--- a/src/protocols/ExternalRadio/ExternalRadio.h
+++ b/src/protocols/ExternalRadio/ExternalRadio.h
@@ -3,7 +3,9 @@
 
 #include "../../TypeDef.h"
 #include "../../Module.h"
+#if defined(RADIOLIB_BUILD_ARDUINO)
 #include "../../ArduinoHal.h"
+#endif
 
 #include "../PhysicalLayer/PhysicalLayer.h"