diff --git a/bitcoin/src/crypto/ecdsa.rs b/bitcoin/src/crypto/ecdsa.rs
index 1bdb347d..1b0c3c69 100644
--- a/bitcoin/src/crypto/ecdsa.rs
+++ b/bitcoin/src/crypto/ecdsa.rs
@@ -199,12 +199,14 @@ pub enum Error {
 
 impl fmt::Display for Error {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        use Error::*;
+
         match *self {
-            Error::Hex(ref e) => write_err!(f, "Signature hex decoding error"; e),
-            Error::NonStandardSighashType(hash_ty) =>
-                write!(f, "Non standard signature hash type {}", hash_ty),
-            Error::EmptySignature => write!(f, "Empty ECDSA signature"),
-            Error::Secp256k1(ref e) => write_err!(f, "invalid ECDSA signature"; e),
+            Hex(ref e) => write_err!(f, "signature hex decoding error"; e),
+            NonStandardSighashType(hash_ty) =>
+                write!(f, "non-standard signature hash type {}", hash_ty),
+            EmptySignature => write!(f, "empty ECDSA signature"),
+            Secp256k1(ref e) => write_err!(f, "invalid ECDSA signature"; e),
         }
     }
 }
diff --git a/bitcoin/src/crypto/key.rs b/bitcoin/src/crypto/key.rs
index e870592c..dbe6e97d 100644
--- a/bitcoin/src/crypto/key.rs
+++ b/bitcoin/src/crypto/key.rs
@@ -41,12 +41,14 @@ pub enum Error {
 
 impl fmt::Display for Error {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        use Error::*;
+
         match *self {
-            Error::Base58(ref e) => write_err!(f, "key base58 error"; e),
-            Error::Secp256k1(ref e) => write_err!(f, "key secp256k1 error"; e),
-            Error::InvalidKeyPrefix(ref b) => write!(f, "key prefix invalid: {}", b),
-            Error::Hex(ref e) => write_err!(f, "key hex decoding error"; e),
-            Error::InvalidHexLength(got) =>
+            Base58(ref e) => write_err!(f, "key base58 error"; e),
+            Secp256k1(ref e) => write_err!(f, "key secp256k1 error"; e),
+            InvalidKeyPrefix(ref b) => write!(f, "key prefix invalid: {}", b),
+            Hex(ref e) => write_err!(f, "key hex decoding error"; e),
+            InvalidHexLength(got) =>
                 write!(f, "PublicKey hex should be 66 or 130 digits long, got: {}", got),
         }
     }