diff --git a/advanced/README.md b/advanced/README.md
index 1a8bdf2..31d0c28 100644
--- a/advanced/README.md
+++ b/advanced/README.md
@@ -270,11 +270,13 @@ The definition of `Descriptor::Configuration` as well as the associated test has
 Now, proceed as follows:
 
 1. **Parse GET_DESCRIPTOR requests:**  
-Modify `Request::parse()` in `advanced/common/usb` to recognize a GET_DESCRIPTOR request so that the `get_descriptor_device` test passes. Note that the parser already handles SET_ADDRESS requests.
+Modify `Request::parse()` in `advanced/common/usb/src/lib.rs` to recognize a GET_DESCRIPTOR request so that the `get_descriptor_device` test passes. Note that the parser already handles SET_ADDRESS requests.
     - check table 9-4 in the USB specification for Request Codes
     - remember that you can define binary literals by prefixing them with `0b`
     - you can use bit shifts (`>>`) and casts (`as u8`) to get the high/low bytes of a `u16`
 
+See `advanced/common/usb/src/get-descriptor-device.rs` for a solution.
+
 2. **Read incoming request information and pass it to the parser:**  
 modify `usb-2.rs` to read `USBD` registers and parse the SETUP data when an EPSETUP event is received.
     - for a mapping of register names to the `USBD` API, check the entry for `nrf52840_hal::target::usbd` in the documentation you've created using `cargo doc`