Missing imports
diff --git a/cryptography/hazmat/backends/openssl/backend.py b/cryptography/hazmat/backends/openssl/backend.py
index 5de506a..e37dba5 100644
--- a/cryptography/hazmat/backends/openssl/backend.py
+++ b/cryptography/hazmat/backends/openssl/backend.py
@@ -18,8 +18,8 @@
from cryptography import utils
from cryptography.exceptions import (
- InvalidTag, InternalError, AlreadyFinalized, UnsupportedPadding,
- InvalidSignature
+ InvalidTag, InternalError, AlreadyFinalized, UnsupportedCipher,
+ UnsupportedHash, UnsupportedPadding, InvalidSignature
)
from cryptography.hazmat.backends.interfaces import (
CipherBackend, HashBackend, HMACBackend, PBKDF2HMACBackend, RSABackend