3 files changed, 9 insertions, 9 deletions
diff --git a/src/cryptography/hazmat/primitives/asymmetric/dsa.py b/src/cryptography/hazmat/primitives/asymmetric/dsa.py
index 733a967c..184177e0 100644
--- a/src/cryptography/hazmat/primitives/asymmetric/dsa.py
+++ b/src/cryptography/hazmat/primitives/asymmetric/dsa.py
@@ -91,9 +91,6 @@ class DSAPublicKey(object):
         Returns an AsymmetricVerificationContext used for signing data.
         """
 
-
-@six.add_metaclass(abc.ABCMeta)
-class DSAPublicKeyWithSerialization(DSAPublicKey):
     @abc.abstractmethod
     def public_numbers(self):
         """
@@ -107,6 +104,9 @@ class DSAPublicKeyWithSerialization(DSAPublicKey):
         """
 
 
+DSAPublicKeyWithSerialization = DSAPublicKey
+
+
 def generate_parameters(key_size, backend):
     return backend.generate_dsa_parameters(key_size)
 
diff --git a/src/cryptography/hazmat/primitives/asymmetric/ec.py b/src/cryptography/hazmat/primitives/asymmetric/ec.py
index 631fcbf7..f1d39eed 100644
--- a/src/cryptography/hazmat/primitives/asymmetric/ec.py
+++ b/src/cryptography/hazmat/primitives/asymmetric/ec.py
@@ -85,9 +85,6 @@ class EllipticCurvePublicKey(object):
         The EllipticCurve that this key is on.
         """
 
-
-@six.add_metaclass(abc.ABCMeta)
-class EllipticCurvePublicKeyWithSerialization(EllipticCurvePublicKey):
     @abc.abstractmethod
     def public_numbers(self):
         """
@@ -101,6 +98,9 @@ class EllipticCurvePublicKeyWithSerialization(EllipticCurvePublicKey):
         """
 
 
+EllipticCurvePublicKeyWithSerialization = EllipticCurvePublicKey
+
+
 @utils.register_interface(EllipticCurve)
 class SECT571R1(object):
     name = "sect571r1"
diff --git a/src/cryptography/hazmat/primitives/asymmetric/rsa.py b/src/cryptography/hazmat/primitives/asymmetric/rsa.py
index 772473fd..89eac4d4 100644
--- a/src/cryptography/hazmat/primitives/asymmetric/rsa.py
+++ b/src/cryptography/hazmat/primitives/asymmetric/rsa.py
@@ -76,9 +76,6 @@ class RSAPublicKey(object):
         The bit length of the public modulus.
         """
 
-
-@six.add_metaclass(abc.ABCMeta)
-class RSAPublicKeyWithSerialization(RSAPublicKey):
     @abc.abstractmethod
     def public_numbers(self):
         """
@@ -92,6 +89,9 @@ class RSAPublicKeyWithSerialization(RSAPublicKey):
         """
 
 
+RSAPublicKeyWithSerialization = RSAPublicKey
+
+
 def generate_private_key(public_exponent, key_size, backend):
     if not isinstance(backend, RSABackend):
         raise UnsupportedAlgorithm(