--- a/plugins/muc/subject.lib.lua	Mon Oct 05 21:54:17 2020 +0200
+++ b/plugins/muc/subject.lib.lua	Mon Oct 05 22:19:55 2020 +0200
@@ -31,10 +31,10 @@
 
 module:hook("muc-disco#info", function (event)
 	table.insert(event.form, {
-		name = "muc#roominfo_changesubject";
+		name = "muc#roomconfig_changesubject";
 		type = "boolean";
 	});
-	event.formdata["muc#roominfo_changesubject"] = get_changesubject(event.room);
+	event.formdata["muc#roomconfig_changesubject"] = get_changesubject(event.room);
 end);
 
 module:hook("muc-config-form", function(event)