diff --git a/src/util/base58.rs b/src/util/base58.rs
index c2900a1d..7d04b77a 100644
--- a/src/util/base58.rs
+++ b/src/util/base58.rs
@@ -48,8 +48,8 @@ impl fmt::Display for Error {
             Error::BadByte(b) => write!(f, "invalid base58 character 0x{:x}", b),
             Error::BadChecksum(exp, actual) => write!(f, "base58ck checksum 0x{:x} does not match expected 0x{:x}", actual, exp),
             Error::InvalidLength(ell) => write!(f, "length {} invalid for this base58 type", ell),
-            Error::InvalidAddressVersion(ref v) => write!(f, "address version {:?} invalid for this base58 type", v),
-            Error::InvalidExtendedKeyVersion(ref v) => write!(f, "extended key version {:?} invalid for this base58 type", v),
+            Error::InvalidAddressVersion(ref v) => write!(f, "address version {} is invalid for this base58 type", v),
+            Error::InvalidExtendedKeyVersion(ref v) => write!(f, "extended key version {:#04x?} is invalid for this base58 type", v),
             Error::TooShort(_) => write!(f, "base58ck data not even long enough for a checksum"),
             Error::Secp256k1(ref e) => fmt::Display::fmt(&e, f),
         }