diff --git a/UPGRADE.txt b/UPGRADE.txt
index f2c3a7c2dc..7db4379500 100644
--- a/UPGRADE.txt
+++ b/UPGRADE.txt
@@ -172,6 +172,9 @@ From 1.6.2 to 1.8:
   are using the early media DTMF overlap dialing method you now need to set
   allowoverlap=dtmf.
 
+* If no transport is specified in sip.conf, transport will default to UDP.
+  Also, if multiple transport= lines are used, only the last will be used.
+
 From 1.6.1 to 1.6.2:
 
 * SIP no longer sends the 183 progress message for early media by