diff --git a/src/cryptography/hazmat/backends/openssl/backend.py b/src/cryptography/hazmat/backends/openssl/backend.py
index 89b1a7b..d30bfc2 100644
--- a/src/cryptography/hazmat/backends/openssl/backend.py
+++ b/src/cryptography/hazmat/backends/openssl/backend.py
@@ -15,9 +15,7 @@
 import six
 
 from cryptography import utils, x509
-from cryptography.exceptions import (
-    InternalError, UnsupportedAlgorithm, _Reasons
-)
+from cryptography.exceptions import UnsupportedAlgorithm, _Reasons
 from cryptography.hazmat.backends.interfaces import (
     CMACBackend, CipherBackend, DERSerializationBackend, DSABackend,
     EllipticCurveBackend, HMACBackend, HashBackend, PBKDF2HMACBackend,