diff --git a/content/references/rippled-api/public-rippled-methods/subscription-methods/subscribe.md b/content/references/rippled-api/public-rippled-methods/subscription-methods/subscribe.md
index 185ec54faa..2496fee6de 100644
--- a/content/references/rippled-api/public-rippled-methods/subscription-methods/subscribe.md
+++ b/content/references/rippled-api/public-rippled-methods/subscription-methods/subscribe.md
@@ -187,6 +187,7 @@ The validations stream sends messages whenever it receives validation messages,
     "ledger_hash":"EC02890710AAA2B71221B0D560CFB22D64317C07B7406B02959AD84BAD33E602",
     "ledger_index":"6",
     "load_fee":256000,
+    "master_key": "nHUon2tpyJEHHYGmxqeGu37cvPYHzrMtUNQFVdCgGNvEkjmCpTqK",
     "reserve_base":20000000,
     "reserve_inc":5000000,
     "signature":"3045022100E199B55643F66BC6B37DBC5E185321CF952FD35D13D9E8001EB2564FFB94A07602201746C9A4F7A93647131A2DEB03B76F05E426EC67A5A27D77F4FF2603B9A528E6",
@@ -207,11 +208,12 @@ The fields from a validations stream message are as follows:
 | `ledger_hash`           | String           | The identifying hash of the proposed ledger is being validated. |
 | `ledger_index`          | String - Integer | The [Ledger Index][] of the proposed ledger. [New in: rippled 0.31.0][] |
 | `load_fee`              | Integer          | (May be omitted) The local load-scaled transaction cost this validator is currently enforcing, in fee units. [New in: rippled 0.32.0][] |
+| `master_key`            | String           | _(May be omitted)_ The validator's master public key, if the validator is using a validator token, in the XRP Ledger's [base58][] format. (See also: [Enable Validation on your `rippled` Server](run-rippled-as-a-validator.html#3-enable-validation-on-your-rippled-server).) [New in: rippled 1.40.0][] |
 | `reserve_base`          | Integer          | (May be omitted) The minimum reserve requirement (`account_reserve` value) this validator wants to set by [Fee Voting](fee-voting.html). [New in: rippled 0.32.0][] |
 | `reserve_inc`           | Integer          | (May be omitted) The increment in the reserve requirement (`owner_reserve` value) this validator wants to set by [Fee Voting](fee-voting.html). [New in: rippled 0.32.0][] |
 | `signature`             | String           | The signature that the validator used to sign its vote for this ledger. |
 | `signing_time`          | Number           | When this validation vote was signed, in [seconds since the Ripple Epoch][]. [New in: rippled 0.32.0][] |
-| `validation_public_key` | String           | The public key from the key-pair that the validator used to sign the message, in the XRP Ledger's [base58][] format. This identifies the validator sending the message and can also be used to verify the `signature`. |
+| `validation_public_key` | String           | The public key from the key-pair that the validator used to sign the message, in the XRP Ledger's [base58][] format. This identifies the validator sending the message and can also be used to verify the `signature`. If the validator is using a token, this is an ephemeral public key. |
 
 
 ## Transaction Streams