diff --git a/src/lib.rs b/src/lib.rs
index def5dcf59..c4945816e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -63,6 +63,7 @@ struct ArithmeticOverflow;
 macro_rules! impl_err_checked_arithmetic {
     ($($ty:ty),*) => {
         $(
+            #[allow(dead_code)]
             impl ErrCheckedArithmetic for $ty {
                 fn err_checked_add(self, other: $ty) -> Result<Self, ArithmeticOverflow> {
                     self.checked_add(other).ok_or(ArithmeticOverflow)