diff --git a/vmnotify b/vmnotify
index f441e5a..f6d1bc3 100755
--- a/vmnotify
+++ b/vmnotify
@@ -77,7 +77,8 @@ BODY_VM="Voice-Message: $NEW/$OLD"
 BODYLEN=$((${#BODY_MW}+2+${#BODY_VM}+2))
 CALL_ID=$($UUIDGEN)@voip.sipwise.local
 MBID=$USER
+BRANCH=$($UUIDGEN)
 
-$SIPSAK -f $SIPFILE \
-	-G -g "!BODY_MW!$BODY_MW!BODY_VM!$BODY_VM!BODYLEN!$BODYLEN!CALL_ID!$CALL_ID!MBID!$MBID!" \
+$SIPSAK -f -i -l 5081 -S $SIPFILE \
+	-G -g "!BODY_MW!$BODY_MW!BODY_VM!$BODY_VM!BODYLEN!$BODYLEN!CALL_ID!$CALL_ID!MBID!$MBID!BRANCH!$BRANCH!" \
 	$VERBOSE -E udp -s $URI