diff --git a/src/allmydata/scripts/common.py b/src/allmydata/scripts/common.py
index 336c7b4ef..13f67abab 100644
--- a/src/allmydata/scripts/common.py
+++ b/src/allmydata/scripts/common.py
@@ -5,7 +5,9 @@ import codecs
 from os.path import join
 
 # BBB: Python 2 compatibility
-from builtins import str
+from future.utils import PY2
+if PY2:
+    from future.builtins import str  # noqa: F401
 from six.moves.configparser import NoSectionError
 
 from twisted.python import usage
diff --git a/src/allmydata/scripts/stats_gatherer.py b/src/allmydata/scripts/stats_gatherer.py
index 8e1c7dc2a..57136f872 100644
--- a/src/allmydata/scripts/stats_gatherer.py
+++ b/src/allmydata/scripts/stats_gatherer.py
@@ -3,7 +3,9 @@ from __future__ import print_function
 import os
 
 # BBB: Python 2 compatibility
-from builtins import str
+from future.utils import PY2
+if PY2:
+    from future.builtins import str  # noqa: F401
 
 from twisted.python import usage
 
diff --git a/src/allmydata/scripts/tahoe_check.py b/src/allmydata/scripts/tahoe_check.py
index c5f4fc235..6531ec285 100644
--- a/src/allmydata/scripts/tahoe_check.py
+++ b/src/allmydata/scripts/tahoe_check.py
@@ -4,7 +4,9 @@ import urllib
 import json
 
 # BBB: Python 2 compatibility
-from builtins import str
+from future.utils import PY2
+if PY2:
+    from future.builtins import str  # noqa: F401
 
 from twisted.protocols.basic import LineOnlyReceiver
 
diff --git a/src/allmydata/stats.py b/src/allmydata/stats.py
index a4d52b08d..e8e3e2965 100644
--- a/src/allmydata/stats.py
+++ b/src/allmydata/stats.py
@@ -7,7 +7,9 @@ import time
 from collections import deque
 
 # BBB: Python 2 compatibility
-from builtins import str
+from future.utils import PY2
+if PY2:
+    from future.builtins import str  # noqa: F401
 
 from twisted.internet import reactor
 from twisted.application import service
diff --git a/src/allmydata/test/check_load.py b/src/allmydata/test/check_load.py
index 548404060..3a8e835de 100644
--- a/src/allmydata/test/check_load.py
+++ b/src/allmydata/test/check_load.py
@@ -38,7 +38,9 @@ import os, sys, httplib, binascii
 import urllib, json, random, time, urlparse
 
 # BBB: Python 2 compatibility
-from builtins import str
+from future.utils import PY2
+if PY2:
+    from future.builtins import str  # noqa: F401
 
 if sys.argv[1] == "--stats":
     statsfiles = sys.argv[2:]
diff --git a/src/allmydata/test/check_memory.py b/src/allmydata/test/check_memory.py
index 2b86d0abf..174b69d4f 100644
--- a/src/allmydata/test/check_memory.py
+++ b/src/allmydata/test/check_memory.py
@@ -3,7 +3,9 @@ from __future__ import print_function
 import os, shutil, sys, urllib, time, stat, urlparse
 
 # BBB: Python 2 compatibility
-from builtins import str
+from future.utils import PY2
+if PY2:
+    from future.builtins import str  # noqa: F401
 from six.moves import cStringIO as StringIO
 
 from twisted.internet import defer, reactor, protocol, error
diff --git a/src/allmydata/test/mutable/test_version.py b/src/allmydata/test/mutable/test_version.py
index d26e684ed..35dea9411 100644
--- a/src/allmydata/test/mutable/test_version.py
+++ b/src/allmydata/test/mutable/test_version.py
@@ -3,7 +3,9 @@ from __future__ import print_function
 import os
 
 # BBB: Python 2 compatibility
-from builtins import str
+from future.utils import PY2
+if PY2:
+    from future.builtins import str  # noqa: F401
 from six.moves import cStringIO as StringIO
 
 from twisted.internet import defer
diff --git a/src/allmydata/test/test_auth.py b/src/allmydata/test/test_auth.py
index eb59b955b..d6daba24e 100644
--- a/src/allmydata/test/test_auth.py
+++ b/src/allmydata/test/test_auth.py
@@ -1,5 +1,7 @@
 # BBB: Python 2 compatibility
-from builtins import str
+from future.utils import PY2
+if PY2:
+    from future.builtins import str  # noqa: F401
 
 from twisted.trial import unittest
 from twisted.python import filepath