diff --git a/ESP32/comm_esp32_hardwareserial.cpp b/ESP32/comm_esp32_hardwareserial.cpp
index c82dac0..1731887 100644
--- a/ESP32/comm_esp32_hardwareserial.cpp
+++ b/ESP32/comm_esp32_hardwareserial.cpp
@@ -1,3 +1,6 @@
+// (C) 2024 by Folkert van Heusden
+// Released under MIT license
+
 #include "gen.h"
 
 #if defined(ESP32)
diff --git a/ESP32/comm_esp32_hardwareserial.h b/ESP32/comm_esp32_hardwareserial.h
index 10d6699..5b9cf83 100644
--- a/ESP32/comm_esp32_hardwareserial.h
+++ b/ESP32/comm_esp32_hardwareserial.h
@@ -1,3 +1,7 @@
+// (C) 2024 by Folkert van Heusden
+// Released under MIT license
+
+#include "gen.h"
 #include "comm.h"