diff --git a/src/IRCLine.py b/src/IRCLine.py
index f515a01a..2b1eb63d 100644
--- a/src/IRCLine.py
+++ b/src/IRCLine.py
@@ -1,6 +1,7 @@
 import datetime, typing
 from src import IRCObject, utils
 
+# this should be 510 (RFC1459, 512 with \r\n) but a server BitBot uses is broken
 LINE_CUTOFF = 470
 
 class Line(IRCObject.Object):