diff --git a/setup.py b/setup.py
index bb843d4d1..0c4367b08 100755
--- a/setup.py
+++ b/setup.py
@@ -288,7 +288,8 @@ def run(self):
             sys.exit(1)
         weekly_version = 'weekly-v%s' % version
         log.info('tagging as %s', weekly_version)
-        subprocess.check_call('git tag -f'.split() + [weekly_version])
+        subprocess.check_call('git tag -f -m'.split()
+                              + [weekly_version, weekly_version])
 
 cmdclass['tag_weekly'] = TagWeekly