diff --git a/ampel-firmware/sensor_console.h b/ampel-firmware/sensor_console.h
index fe30469d47c9fa47f35beed710ef037b0484a731..9594317b575bf53db0da92f34e62613423fe6a75 100644
--- a/ampel-firmware/sensor_console.h
+++ b/ampel-firmware/sensor_console.h
@@ -1,6 +1,6 @@
 #ifndef SENSOR_CONSOLE_H_INCLUDED
 #define SENSOR_CONSOLE_H_INCLUDED
-#include <Arduino.h>
+#include <Arduino.h> // For Flash strings, uint8_t and int32_t
 
 /** Other scripts can use this namespace, in order to define commands, via callbacks.
  * Those callbacks can then be used to send commands to the sensor (reset, calibrate, led on/off, ...)
@@ -12,7 +12,7 @@ namespace sensor_console {
   void defineIntCommand(const char *name, void (*function)(int32_t), const __FlashStringHelper *doc_fstring);
   void defineStringCommand(const char *name, void (*function)(char*), const __FlashStringHelper *doc_fstring);
 
-  void processSerialInput(const byte in_byte);
+  void processSerialInput(const uint8_t in_byte);
 
   void execute(const char *command_line);
 }