diff --git a/atmel-samd/boards/arduino_zero/mpconfigboard.h b/atmel-samd/boards/arduino_zero/mpconfigboard.h
index 42b4e76358..34a22c81ae 100644
--- a/atmel-samd/boards/arduino_zero/mpconfigboard.h
+++ b/atmel-samd/boards/arduino_zero/mpconfigboard.h
@@ -1,11 +1,9 @@
-// LEDs
-#define MICROPY_HW_LED1              PIN_PA17 // red
-// #define UART_REPL
 #define USB_REPL
 
 #define MICROPY_HW_BOARD_NAME "Arduino Zero"
 #define MICROPY_HW_MCU_NAME "samd21g18"
 
+#define MICROPY_HW_LED_MSC  PIN_PA17 // red
 #define MICROPY_HW_LED_TX   PIN_PA27
 #define MICROPY_HW_LED_RX   PIN_PB03