diff --git a/supervisor/supervisor.mk b/supervisor/supervisor.mk
index 0717785e7f..21803ae0a3 100644
--- a/supervisor/supervisor.mk
+++ b/supervisor/supervisor.mk
@@ -122,7 +122,7 @@ endif
 ifeq ($(CIRCUITPY_USB_HID),1)
 USB_DEVICES_COMPUTED := $(USB_DEVICES_COMPUTED),HID
 endif
-USB_DEVICES := "$(USB_DEVICES_COMPUTED)"
+USB_DEVICES ?= "$(USB_DEVICES_COMPUTED)"
 
 ifndef USB_HID_DEVICES
 USB_HID_DEVICES = "KEYBOARD,MOUSE,CONSUMER,GAMEPAD"