diff --git a/setup.py b/setup.py
index 5c9d52f..a30c65c 100755
--- a/setup.py
+++ b/setup.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 from distutils.core import setup
 
 setup(
diff --git a/test_contextlib2.py b/test_contextlib2.py
index 10f146c..eb96cf1 100755
--- a/test_contextlib2.py
+++ b/test_contextlib2.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 """Unit tests for contextlib.py, and other context managers."""
 
 import sys