diff --git a/shadowsocks/crypto/ctypes_libsodium.py b/shadowsocks/crypto/ctypes_libsodium.py
index 1e81060..efecfd4 100644
--- a/shadowsocks/crypto/ctypes_libsodium.py
+++ b/shadowsocks/crypto/ctypes_libsodium.py
@@ -24,7 +24,7 @@ from __future__ import absolute_import, division, print_function, \
     with_statement
 
 import logging
-from ctypes import CDLL, c_char_p, c_int, c_long, c_ulonglong, byref, \
+from ctypes import CDLL, c_char_p, c_int, c_ulonglong, byref, \
     create_string_buffer, c_void_p
 
 __all__ = ['ciphers']
diff --git a/shadowsocks/encrypt.py b/shadowsocks/encrypt.py
index 2043001..0f6aba8 100644
--- a/shadowsocks/encrypt.py
+++ b/shadowsocks/encrypt.py
@@ -28,13 +28,15 @@ import sys
 import hashlib
 import logging
 
-from shadowsocks.crypto import m2, rc4_md5, salsa20_ctr, ctypes_openssl, table
+from shadowsocks.crypto import m2, rc4_md5, salsa20_ctr,\
+    ctypes_openssl, ctypes_libsodium, table
 
 
 method_supported = {}
 method_supported.update(rc4_md5.ciphers)
 method_supported.update(salsa20_ctr.ciphers)
 method_supported.update(ctypes_openssl.ciphers)
+method_supported.update(ctypes_libsodium.ciphers)
 # let M2Crypto override ctypes_openssl
 method_supported.update(m2.ciphers)
 method_supported.update(table.ciphers)