diff --git a/gpl-lgpl.tex b/gpl-lgpl.tex
index 3b65c3f..ee8a487 100644
--- a/gpl-lgpl.tex
+++ b/gpl-lgpl.tex
@@ -1656,6 +1656,7 @@ software alongside proprietary software or other unrelated Free Software,
 as long as the terms of GPL are adhered to for those packages that are
 truly GPL'd.
 
+%FIXME: need discussion of GPLv2's system library exception somewhere in here.
 \subsection{Right to Private Modification} 
 \label{gplv2-private-modification}