diff --git a/synapse/app/homeserver.py b/synapse/app/homeserver.py
index 3d9d303839d1f134309d518d877e61b00fef00ca..be9be423f0bc6be6976eec57218f2ed5f6d63596 100755
--- a/synapse/app/homeserver.py
+++ b/synapse/app/homeserver.py
@@ -458,7 +458,7 @@ def run(hs):
         stats["timestamp"] = now
         stats["uptime_seconds"] = uptime
         version = sys.version_info
-        stats["python_version"] = (version.major) + (version.minor / 10) + (version.micro / 100)
+        stats["python_version"] = "{}.{}.{}".format(version.major, version.minor, version.micro)
         stats["total_users"] = yield hs.get_datastore().count_all_users()
 
         total_nonbridged_users = yield hs.get_datastore().count_nonbridged_users()