diff --git a/docs/getting-started/flashing-firmware/nrf52/convert-rak4631r.mdx b/docs/getting-started/flashing-firmware/nrf52/convert-rak4631r.mdx
index 90d814b5..d91560c8 100644
--- a/docs/getting-started/flashing-firmware/nrf52/convert-rak4631r.mdx
+++ b/docs/getting-started/flashing-firmware/nrf52/convert-rak4631r.mdx
@@ -24,6 +24,7 @@ Here are two ways to flash the bootloader:
    ```shell
    adafruit-nrfutil --verbose dfu serial --package ./WisCore_RAK4631_Board_Bootloader.zip  -p /dev/ttyACM0 -b 115200 --singlebank --touch 1200
    ```
+   Note: The serial port name (`/dev/ttyACM0`) may differ depending on your operating system. Make sure to identify the correct port name for your setup.
 6. Continue with the normal [flashing instructions](/docs/getting-started/flashing-firmware/nrf52/drag-n-drop)
 
 ## Debugger