diff --git a/eventlet/hubs/epolls.py b/eventlet/hubs/epolls.py
index 0277a0c..17bdfe8 100644
--- a/eventlet/hubs/epolls.py
+++ b/eventlet/hubs/epolls.py
@@ -1,3 +1,4 @@
+import errno
 from eventlet.support import get_errno
 from eventlet import patcher
 time = patcher.original('time')