Add maintainer_email.
diff --git a/setup.py b/setup.py
index 744ed93..9e327cd 100644
--- a/setup.py
+++ b/setup.py
@@ -41,6 +41,7 @@
           unittests or for test harnesses that launch local servers."""),
         license='Apache 2.0',
         maintainer='Google',
+        maintainer_email='greg@krypto.org',
         url='https://github.com/google/python_portpicker',
         package_dir={'': 'src'},
         py_modules=['portpicker'],