diff --git a/derive/src/lib.rs b/derive/src/lib.rs
index e597276..4ecfddf 100644
--- a/derive/src/lib.rs
+++ b/derive/src/lib.rs
@@ -6,7 +6,7 @@ mod traits;
 
 use proc_macro2::TokenStream;
 use quote::quote;
-use syn::{parse_macro_input, DeriveInput, Result, Variant};
+use syn::{parse_macro_input, DeriveInput, Result};
 
 use crate::traits::{
   bytemuck_crate_name, AnyBitPattern, CheckedBitPattern, Contiguous, Derivable,
diff --git a/derive/src/traits.rs b/derive/src/traits.rs
index c31ab43..953787a 100644
--- a/derive/src/traits.rs
+++ b/derive/src/traits.rs
@@ -49,7 +49,7 @@ pub trait Derivable {
   /// should be overridden to return `Some`.
   ///
   /// The default is "the fields of a struct; unions and enums not supported".
-  fn perfect_derive_fields(input: &DeriveInput) -> Option<Fields> {
+  fn perfect_derive_fields(_input: &DeriveInput) -> Option<Fields> {
     None
   }
 }