diff --git a/rp2040-hal/src/uart.rs b/rp2040-hal/src/uart.rs
index d9c1759..a51c4d2 100644
--- a/rp2040-hal/src/uart.rs
+++ b/rp2040-hal/src/uart.rs
@@ -19,6 +19,7 @@ use crate::pac::{
 };
 
 /// Error type for UART operations.
+#[derive(Debug)]
 pub enum Error {
     /// Bad argument : when things overflow, ...
     BadArgument
@@ -234,7 +235,7 @@ impl<D: UARTDevice> UARTPeripheral<Enabled, D> {
                 w.data().bits(*c);
                 w
             });
-            
+
             bytes_written += 1;
         }
         return Ok(&data[bytes_written..])