diff --git a/setup.py b/setup.py
index c1c87847..7239e6cc 100644
--- a/setup.py
+++ b/setup.py
@@ -1,5 +1,7 @@
 from setuptools import setup
+import os
 
+os.environ['PBR_VERSION'] = '0.3.9.twisto.4'
 
 setup(
     setup_requires=['pbr'],