diff --git a/Mailbox-Properties-Client.md b/Mailbox-Properties-Client.md
index 9e8cb97..85486a4 100644
--- a/Mailbox-Properties-Client.md
+++ b/Mailbox-Properties-Client.md
@@ -18,7 +18,7 @@ The client uses a separate BSP group for communicating with each contact. The [g
 For major version 0, the `properties` of a well-formed update are either 0 (empty dict), which means for the receiver that there is no mailbox available. Or, there are precisely 4 items:
 
 * "onionAddress" : String -- Onion Address of mailbox (56 lower-case base32 chars, as derived from the v3 Onion Service public key)
-* "token" : byte[32] -- token used for authenticating with the mailbox
+* "authToken" : byte[32] -- token used for authenticating with the mailbox
 * "inboxId" : byte[32] -- folder id used when receiving data from the mailbox
 * "outboxId" : byte[32] -- folder id used when delivering data to the mailbox