diff --git a/src/internal_macros.rs b/src/internal_macros.rs
index f6029c9e..88a39705 100644
--- a/src/internal_macros.rs
+++ b/src/internal_macros.rs
@@ -95,17 +95,6 @@ macro_rules! impl_array_newtype {
     }
 }
 
-/// Implements debug formatting for a given wrapper type
-macro_rules! impl_array_newtype_show {
-    ($thing:ident) => {
-        impl ::std::fmt::Debug for $thing {
-            fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
-                write!(f, concat!(stringify!($thing), "({:?})"), &self[..])
-            }
-        }
-    }
-}
-
 /// Implements standard indexing methods for a given wrapper type
 macro_rules! impl_index_newtype {
     ($thing:ident, $ty:ty) => {
@@ -583,6 +572,12 @@ macro_rules! impl_bytes_newtype {
             }
         }
 
+        impl ::std::fmt::Debug for $t {
+            fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
+                fmt::LowerHex::fmt(self, f)
+            }
+        }
+
         impl $crate::hashes::hex::FromHex for $t {
             fn from_byte_iter<I>(iter: I) -> Result<Self, $crate::hashes::hex::Error>
                 where I: ::std::iter::Iterator<Item=Result<u8, $crate::hashes::hex::Error>> +
diff --git a/src/util/bip32.rs b/src/util/bip32.rs
index c28d337a..46727377 100644
--- a/src/util/bip32.rs
+++ b/src/util/bip32.rs
@@ -33,14 +33,12 @@ use util::key::{self, PublicKey, PrivateKey};
 #[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct ChainCode([u8; 32]);
 impl_array_newtype!(ChainCode, u8, 32);
-impl_array_newtype_show!(ChainCode);
 impl_bytes_newtype!(ChainCode, 32);
 
 /// A fingerprint
 #[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct Fingerprint([u8; 4]);
 impl_array_newtype!(Fingerprint, u8, 4);
-impl_array_newtype_show!(Fingerprint);
 impl_bytes_newtype!(Fingerprint, 4);
 
 impl Default for Fingerprint {