diff --git a/hashes/src/util.rs b/hashes/src/util.rs
index 743e94c7..d9d6f5e1 100644
--- a/hashes/src/util.rs
+++ b/hashes/src/util.rs
@@ -302,13 +302,6 @@ macro_rules! hash_newtype_struct {
     };
 }
 
-#[doc(hidden)]
-#[macro_export]
-macro_rules! hash_newtype_our_attrs {
-    (hash_newtype($($attr:tt)*)) => { $($attr)* };
-    ($($ignore:tt)*) => {};
-}
-
 #[doc(hidden)]
 #[macro_export]
 macro_rules! hash_newtype_get_direction {