diff --git a/content/references/rippled-api/ledger-data-formats/ledger-object-types/negativeunl.md b/content/references/rippled-api/ledger-data-formats/ledger-object-types/negativeunl.md
index 13b6c230e3..432ac085f4 100644
--- a/content/references/rippled-api/ledger-data-formats/ledger-object-types/negativeunl.md
+++ b/content/references/rippled-api/ledger-data-formats/ledger-object-types/negativeunl.md
@@ -10,6 +10,8 @@ blurb: List of validators currently believed to be offline.
 ---
 # NegativeUNL
 
+_(Requires the [NegativeUNL amendment]() :not_enabled:)_
+
 The `NegativeUNL` object type contains the current status of the [Negative UNL](negative-unl.html), a list of trusted validators currently believed to be offline.
 
 Each ledger version contains **at most one** `NegativeUNL` object. If no validators are currently disabled or scheduled to be disabled, there is no `NegativeUNL` object in the ledger.
diff --git a/content/references/rippled-api/transaction-formats/pseudo-transaction-types/unlmodify.md b/content/references/rippled-api/transaction-formats/pseudo-transaction-types/unlmodify.md
index bc22793c08..7e2f333546 100644
--- a/content/references/rippled-api/transaction-formats/pseudo-transaction-types/unlmodify.md
+++ b/content/references/rippled-api/transaction-formats/pseudo-transaction-types/unlmodify.md
@@ -10,6 +10,8 @@ blurb: Change the list of trusted validators currently considered offline.
 ---
 # UNLModify
 
+_(Requires the [NegativeUNL amendment]() :not_enabled:)_
+
 A `UNLModify` [pseudo-transaction](pseudo-transaction-types.html) marks a change to the [Negative UNL](negative-unl.html), indicating that a trusted validator has gone offline or come back online.
 
 **Note:** You cannot send a pseudo-transaction, but you may find one when processing ledgers.