diff --git a/draft-ietf-lsvr-l3dl.xml b/draft-ietf-lsvr-l3dl.xml
index 678e639..a28dd87 100644
--- a/draft-ietf-lsvr-l3dl.xml
+++ b/draft-ietf-lsvr-l3dl.xml
@@ -313,8 +313,13 @@
 |                             |
 |             OPEN            | MACs, IDs, and Capabilities
 |---------------------------->|
+|            ACK              |
+|<----------------------------|
+|                             |
 |             OPEN            | Mandatory
 |<----------------------------|
+|            ACK              |
+|<----------------------------|
 |                             |
 |                             |
 |   Interface IPv4 Addresses  | Interface IPv4 Addresses