diff --git a/setup.py b/setup.py
index 0334eeb..e050401 100644
--- a/setup.py
+++ b/setup.py
@@ -31,7 +31,7 @@ setup(
     long_description=long_description,
     license='BSD',
     platforms=['any'],
-    packages=['injector'],
+    py_modules=['injector'],
     author='Alec Thomas',
     author_email='alec@swapoff.org',
     test_suite='injector.test',