1 files changed, 6 insertions, 1 deletions
diff --git a/cryptography/hazmat/bindings/openssl/backend.py b/cryptography/hazmat/bindings/openssl/backend.py
index 0c3d22d5..1cb886dc 100644
--- a/cryptography/hazmat/bindings/openssl/backend.py
+++ b/cryptography/hazmat/bindings/openssl/backend.py
@@ -21,7 +21,7 @@ import cffi
 from cryptography.exceptions import UnsupportedAlgorithm
 from cryptography.hazmat.primitives import interfaces
 from cryptography.hazmat.primitives.ciphers.algorithms import (
-    AES, Blowfish, Camellia, CAST5, TripleDES,
+    AES, Blowfish, Camellia, CAST5, TripleDES, ARC4,
 )
 from cryptography.hazmat.primitives.ciphers.modes import (
     CBC, CTR, ECB, OFB, CFB
@@ -254,6 +254,11 @@ class Ciphers(object):
             ECB,
             GetCipherByName("cast5-ecb")
         )
+        self.register_cipher_adapter(
+            ARC4,
+            type(None),
+            GetCipherByName("rc4")
+        )
 
     def create_encrypt_ctx(self, cipher, mode):
         return _CipherContext(self._backend, cipher, mode,