diff --git a/contrib/systemd/copyparty.service b/contrib/systemd/copyparty.service
index 11fc7d55..0e48436a 100644
--- a/contrib/systemd/copyparty.service
+++ b/contrib/systemd/copyparty.service
@@ -13,6 +13,10 @@
 #   But note that journalctl will get the timestamps wrong due to
 #   python disabling line-buffering, so messages are out-of-order:
 #   https://user-images.githubusercontent.com/241032/126040249-cb535cc7-c599-4931-a796-a5d9af691bad.png
+#
+# enable line-buffering for realtime logging (slight performance cost):
+#   modify ExecStart and prefix it with `/bin/stdbuf -oL` like so:
+#   ExecStart=/bin/stdbuf -oL /usr/bin/python3 [...]
 
 [Unit]
 Description=copyparty file server