diff --git a/src/allmydata/monitor.py b/src/allmydata/monitor.py
index 98c463014..1559a30d9 100644
--- a/src/allmydata/monitor.py
+++ b/src/allmydata/monitor.py
@@ -1,7 +1,21 @@
+"""
+Manage status of long-running operations.
+
+Ported to Python 3.
+"""
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
+
+from future.utils import PY2
+if PY2:
+    from builtins import filter, map, zip, ascii, chr, hex, input, next, oct, open, pow, round, super, bytes, dict, list, object, range, str, max, min  # noqa: F401
 
 from zope.interface import Interface, implementer
 from allmydata.util import observer
 
+
 class IMonitor(Interface):
     """I manage status, progress, and cancellation for long-running operations.
 
diff --git a/src/allmydata/util/_python3.py b/src/allmydata/util/_python3.py
index f8260078f..f05beed88 100644
--- a/src/allmydata/util/_python3.py
+++ b/src/allmydata/util/_python3.py
@@ -24,6 +24,7 @@ PORTED_MODULES = [
     "allmydata.crypto.util",
     "allmydata.hashtree",
     "allmydata.interfaces",
+    "allmydata.monitor",
     "allmydata.test.common_py3",
     "allmydata.util._python3",
     "allmydata.util.abbreviate",