diff --git a/ports/nrf/boards/arduino_nano_33_ble/mpconfigboard.mk b/ports/nrf/boards/arduino_nano_33_ble/mpconfigboard.mk
index 9b16834b50..cf6203bf18 100644
--- a/ports/nrf/boards/arduino_nano_33_ble/mpconfigboard.mk
+++ b/ports/nrf/boards/arduino_nano_33_ble/mpconfigboard.mk
@@ -6,3 +6,4 @@ USB_MANUFACTURER = "Arduino"
 MCU_CHIP = nrf52840
 
 INTERNAL_FLASH_FILESYSTEM = 1
+CIRCUITPY_ULAB = 0