diff --git a/Shorewall/releasenotes.txt b/Shorewall/releasenotes.txt
index 1e49772c4..460ae6b5d 100644
--- a/Shorewall/releasenotes.txt
+++ b/Shorewall/releasenotes.txt
@@ -260,6 +260,7 @@ None.
 	A - Append
 	R - Replaced
 	I - Inserted
+	T - Shell source text -- converted into rules at run-time.
 	D - Deleted Rule
 	X - Deleted Chain