diff --git a/bin-for-dist/test_install.py b/bin-for-dist/test_install.py
index b18bdc0d5..e70f1cad1 100644
--- a/bin-for-dist/test_install.py
+++ b/bin-for-dist/test_install.py
@@ -1,6 +1,6 @@
 import py
 import subprocess
-import os
+import os, sys
 
 execnet = py.test.importorskip("execnet")