diff --git a/oauth_hook/hook.py b/oauth_hook/hook.py
index 939c495..0af16e7 100644
--- a/oauth_hook/hook.py
+++ b/oauth_hook/hook.py
@@ -32,6 +32,8 @@ class OAuthHook(object):
     OAUTH_VERSION = '1.0'
     header_auth = False
     signature = CustomSignatureMethod_HMAC_SHA1()
+    consumer_key = None
+    consumer_secret = None
 
     def __init__(self, access_token=None, access_token_secret=None, consumer_key=None, consumer_secret=None, header_auth=None):
         """