diff --git a/advanced/firmware/src/bin/usb-4-solution.rs b/advanced/firmware/src/bin/usb-4-solution.rs
index 0b8bd5d..2301173 100644
--- a/advanced/firmware/src/bin/usb-4-solution.rs
+++ b/advanced/firmware/src/bin/usb-4-solution.rs
@@ -54,7 +54,7 @@ fn on_event(usbd: &USBD, ep0in: &mut Ep0In, state: &mut State, event: Event) {
 
         Event::UsbEp0DataDone => {
             log::info!("EP0IN: transfer complete");
-            ep0in.end(usbd)
+            ep0in.end(usbd);
         }
 
         Event::UsbEp0Setup => {