diff --git a/advanced/common/usb/solution-get-descriptor-configuration.rs b/advanced/common/usb/solution-get-descriptor-configuration.rs
index 2f4bb2f..1b43a06 100644
--- a/advanced/common/usb/solution-get-descriptor-configuration.rs
+++ b/advanced/common/usb/solution-get-descriptor-configuration.rs
@@ -1,5 +1,5 @@
 //! Some USB 2.0 data types
-// NOTE this is a partial solution to exercise `usb-3`
+// NOTE this is a partial solution to exercise `usb-4`
 
 #![deny(missing_docs)]
 #![deny(warnings)]