diff --git a/Shorewall/rfc1918 b/Shorewall/rfc1918
index 47d7f0b8a..26d707fcd 100644
--- a/Shorewall/rfc1918
+++ b/Shorewall/rfc1918
@@ -22,7 +22,7 @@
 255.255.255.255		RETURN		# We need to allow limited broadcast
 169.254.0.0/16		DROP		# DHCP autoconfig
 172.16.0.0/12		logdrop		# RFC 1918
-192.0.2.0/24		logdrop		# Example addresses
+192.0.2.0/24		logdrop		# Example addresses (RFC 3330)
 192.168.0.0/16		logdrop		# RFC 1918
 #
 # The following are generated with the help of the Python program found at: