Typo in PeriodicCallback

diff --git a/tornado/ioloop.py b/tornado/ioloop.py
index baa21c25f303929643a2e95741969e404130e5bf..6c4b727f85d491412041f6bcaaa40197b0cccb2e 100644 (file)
--- a/tornado/ioloop.py
+++ b/tornado/ioloop.py
@@ -272,7 +272,7 @@ class PeriodicCallback(object):
     def __init__(self, callback, callback_time, io_loop=None):
         self.callback = callback
         self.callback_time = callback_time
-        self.io_loop = io_loop or ioloop.IOLoop.instance()
+        self.io_loop = io_loop or IOLoop.instance()
         self._running = True
 
     def start(self):