Index: inet.4
===================================================================
--- inet.4
+++ inet.4
@@ -244,9 +244,9 @@
 .Va ip.rfc6864
 is disabled) to be randomized instead of incremented by 1 with each packet
 generated.
-This closes a minor information leak which allows remote observers to
-determine the rate of packet generation on the machine by watching the
-counter.
+This prevents IP IDs being abused as a covert channel and also closes
+a minor information leak which allows remote observers to determine
+the rate of packet generation on the machine by watching the counter.
 At the same time, on high-speed links, it can decrease the ID reuse
 cycle greatly.
 Default is 0 (sequential IP IDs).