#include <avr/eeprom.h>
#include "split_util.h"
#include "matrix.h"
-#include "i2c.h"
-#include "serial.h"
#include "keyboard.h"
#include "config.h"
+#ifdef USE_I2C
+# include "i2c.h"
+#else
+# include "serial.h"
+#endif
+
volatile bool isLeftHand = true;
static void setup_handedness(void) {