diff --git a/src/allmydata/immutable/encode.py b/src/allmydata/immutable/encode.py
index fb6733cf7..9351df501 100644
--- a/src/allmydata/immutable/encode.py
+++ b/src/allmydata/immutable/encode.py
@@ -1,5 +1,18 @@
 # -*- test-case-name: allmydata.test.test_encode -*-
 
+"""
+Ported to Python 3.
+"""
+
+from __future__ import division
+from __future__ import absolute_import
+from __future__ import print_function
+from __future__ import unicode_literals
+
+from future.utils import PY2
+if PY2:
+    from future.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
+
 import time
 from zope.interface import implementer
 from twisted.internet import defer
@@ -468,7 +481,7 @@ class Encoder(object):
                      (self,
                       self.segment_size*(segnum+1),
                       self.segment_size*self.num_segments,
-                      100 * (segnum+1) / self.num_segments,
+                      100 * (segnum+1) // self.num_segments,
                       ),
                      level=log.OPERATIONAL)
             elapsed = time.time() - start
diff --git a/src/allmydata/util/_python3.py b/src/allmydata/util/_python3.py
index 04b5651db..6be9077b0 100644
--- a/src/allmydata/util/_python3.py
+++ b/src/allmydata/util/_python3.py
@@ -40,6 +40,7 @@ PORTED_MODULES = [
     "allmydata.immutable.downloader.segmentation",
     "allmydata.immutable.downloader.share",
     "allmydata.immutable.downloader.status",
+    "allmydata.immutable.encode",
     "allmydata.immutable.happiness_upload",
     "allmydata.immutable.literal",
     "allmydata.interfaces",