diff --git a/examples/rp/src/bin/pio_uart.rs b/examples/rp/src/bin/pio_uart.rs
index 45416c56..dca28d77 100644
--- a/examples/rp/src/bin/pio_uart.rs
+++ b/examples/rp/src/bin/pio_uart.rs
@@ -75,6 +75,7 @@ async fn main(_spawner: Spawner) {
         &mut device_descriptor,
         &mut config_descriptor,
         &mut bos_descriptor,
+        &mut [],
         &mut control_buf,
     );