2 files changed, 11 insertions, 9 deletions
diff --git a/src/cryptography/hazmat/primitives/interfaces/__init__.py b/src/cryptography/hazmat/primitives/interfaces/__init__.py
index 6dedd1f8..2f9880da 100644
--- a/src/cryptography/hazmat/primitives/interfaces/__init__.py
+++ b/src/cryptography/hazmat/primitives/interfaces/__init__.py
@@ -12,6 +12,7 @@ from cryptography.hazmat.primitives.interfaces.ciphers import (
     BlockCipherAlgorithm,
     CipherAlgorithm,
     Mode,
+    ModeWithAuthenticationTag,
     ModeWithInitializationVector,
     ModeWithNonce)
 
@@ -19,21 +20,13 @@ __all__ = [
     "BlockCipherAlgorithm",
     "CipherAlgorithm",
     "Mode",
+    "ModeWithAuthenticationTag",
     "ModeWithInitializationVector",
     "ModeWithNonce"
 ]
 
 
 @six.add_metaclass(abc.ABCMeta)
-class ModeWithAuthenticationTag(object):
-    @abc.abstractproperty
-    def tag(self):
-        """
-        The value of the tag supplied to the constructor of this mode.
-        """
-
-
-@six.add_metaclass(abc.ABCMeta)
 class CipherContext(object):
     @abc.abstractmethod
     def update(self, data):
diff --git a/src/cryptography/hazmat/primitives/interfaces/ciphers.py b/src/cryptography/hazmat/primitives/interfaces/ciphers.py
index df6d5f74..075a9c25 100644
--- a/src/cryptography/hazmat/primitives/interfaces/ciphers.py
+++ b/src/cryptography/hazmat/primitives/interfaces/ciphers.py
@@ -65,3 +65,12 @@ class ModeWithNonce(object):
         """
         The value of the nonce for this mode as bytes.
         """
+
+
+@six.add_metaclass(abc.ABCMeta)
+class ModeWithAuthenticationTag(object):
+    @abc.abstractproperty
+    def tag(self):
+        """
+        The value of the tag supplied to the constructor of this mode.
+        """