diff --git a/main.py b/main.py
index a3085f9..5b9b1ec 100644
--- a/main.py
+++ b/main.py
@@ -1,7 +1,7 @@
 import logging
 import tornado.web
+import tornado.ioloop
 
-from tornado.ioloop import IOLoop
 from tornado.options import parse_command_line, options
 from handler import IndexHandler, WsockHandler
 from settings import get_application_settings
@@ -16,7 +16,7 @@ def main():
         (r'/ws', WsockHandler)
     ]
 
-    loop = IOLoop.current()
+    loop = tornado.ioloop.IOLoop.current()
     app = tornado.web.Application(handlers, **settings)
     app._loop = loop
     app.listen(options.port, options.address)
diff --git a/policy.py b/policy.py
index eb40f18..591ff22 100644
--- a/policy.py
+++ b/policy.py
@@ -41,7 +41,7 @@ class AutoAddPolicy(paramiko.client.MissingHostKeyPolicy):
     """
     lock = threading.Lock()
 
-    def is_missing_host_keys(self, client, hostname, key):
+    def is_missing_host_key(self, client, hostname, key):
         k = client._host_keys.lookup(hostname)
         if k is None:
             return True
@@ -53,7 +53,7 @@ class AutoAddPolicy(paramiko.client.MissingHostKeyPolicy):
 
     def missing_host_key(self, client, hostname, key):
         with self.lock:
-            if self.is_missing_host_keys(client, hostname, key):
+            if self.is_missing_host_key(client, hostname, key):
                 keytype = key.get_name()
                 logging.info(
                     'Adding {} host key for {}'.format(keytype, hostname)