2 files changed, 7 insertions, 2 deletions
diff --git a/CHANGES.txt b/CHANGES.txt
index 4bc8d80..ca6d069 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,3 +1,8 @@
+2.5.1
+~~~~~
+
+* Restore Python 2.6 compatibility.
+
 2.5
 ~~~
 
diff --git a/setup.py b/setup.py
index e568ac2..7c6596b 100644
--- a/setup.py
+++ b/setup.py
@@ -10,9 +10,9 @@ import setuptools
 with io.open('README.txt', encoding='utf-8') as readme:
 	long_description = readme.read()
 
-needs_pytest = {'pytest', 'test'}.intersection(sys.argv)
+needs_pytest = set(['pytest', 'test']).intersection(sys.argv)
 pytest_runner = ['pytest-runner'] if needs_pytest else []
-needs_sphinx = {'release', 'build_sphinx', 'upload_docs'}.intersection(sys.argv)
+needs_sphinx = set(['release', 'build_sphinx', 'upload_docs']).intersection(sys.argv)
 sphinx = ['sphinx'] if needs_sphinx else []
 
 setup_params = dict(