diff --git a/content/references/rippled-api/ledger-data-formats/ledger-object-types/accountroot.md b/content/references/rippled-api/ledger-data-formats/ledger-object-types/accountroot.md
index 26c3b1ba41..3d9d765bc5 100644
--- a/content/references/rippled-api/ledger-data-formats/ledger-object-types/accountroot.md
+++ b/content/references/rippled-api/ledger-data-formats/ledger-object-types/accountroot.md
@@ -38,7 +38,7 @@ The `AccountRoot` object has the following fields:
 | `PreviousTxnID`               | String    | Hash256           | The identifying hash of the transaction that most recently modified this object. |
 | `PreviousTxnLgrSeq`           | Number    | UInt32            | The [index of the ledger][Ledger Index] that contains the transaction that most recently modified this object. |
 | `Sequence`                    | Number    | UInt32            | The sequence number of the next valid transaction for this account. (Each account starts with Sequence = 1 and increases each time a transaction is made.) |
-| `AccountTxnID`                | String    | Hash256           | _(Optional)_ The identifying hash of the transaction most recently submitted by this account. |
+| `AccountTxnID`                | String    | Hash256           | _(Optional)_ The identifying hash of the transaction most recently sent by this account. This field must be enabled to use the [AccountTxnID transaction field](transaction-common-fields.html#accounttxnid). To enable it, send an [AccountSet transaction with the asfAccountTxnID flag enabled](accountset.html#accountset-flags). |
 | `Domain`                      | String    | VariableLength    | _(Optional)_ A domain associated with this account. In JSON, this is the hexadecimal for the ASCII representation of the domain. |
 | `EmailHash`                   | String    | Hash128           | _(Optional)_ The md5 hash of an email address. Clients can use this to look up an avatar through services such as [Gravatar](https://en.gravatar.com/). |
 | `MessageKey`                  | String    | VariableLength    | _(Optional)_ A public key that may be used to send encrypted messages to this account. In JSON, uses hexadecimal. No more than 33 bytes. |