diff --git a/setup.py b/setup.py
index 566d844..10732c3 100644
--- a/setup.py
+++ b/setup.py
@@ -26,4 +26,5 @@ except ImportError:
 
 setuptools.setup(
     setup_requires=['pbr>=2.0.0'],
-    pbr=True)
+    pbr=True,
+    py_modules=[])