diff --git a/bookwyrm/settings.py b/bookwyrm/settings.py
index ed1447b05..cd63ebb0d 100644
--- a/bookwyrm/settings.py
+++ b/bookwyrm/settings.py
@@ -371,5 +371,8 @@ HTTP_X_FORWARDED_PROTO = env.bool("SECURE_PROXY_SSL_HEADER", False)
 if HTTP_X_FORWARDED_PROTO:
     SECURE_PROXY_SSL_HEADER = ("HTTP_X_FORWARDED_PROTO", "https")
 
-# AUTHORIZED_FETCH Instance Actor
+# Instance Actor for signing GET requests to "secure mode" 
+# Mastodon servers.
+# Do not change this setting unless you already have an existing
+# user with the same username - in which case you should change it!
 INSTANCE_ACTOR_USERNAME = "bookwyrm.instance.actor"