diff --git a/05.md b/05.md
index 4f8ecdb..1c47f3d 100644
--- a/05.md
+++ b/05.md
@@ -32,7 +32,7 @@ The wallet `Alice` includes the following `PostMeltQuoteBolt11Request` data in i
 }
 ```
 
-Here, `request` is the bolt11 Lightning invoice to be paid and `unit` is the unit the wallet would like to pay with. `amount` **MAY** be passed to pay amountless bolt11 invoices. For bolt11 invoices with an amount, the `amount` field **MUST** be equal to the amount of the bolt11 invoice if included. The request **MAY** be an amountless invoice only if support for amountless invoices is signaled in the `MeltMethodSettings`.
+Here, `request` is the bolt11 Lightning invoice to be paid and `unit` is the unit the wallet would like to pay with. `amount` **MAY** be passed to pay amountless bolt11 invoices. The `amount` **MUST** be in msat and if the bolt11 invoice has an amount, the `amount` field **MUST** be equal to the amount of the bolt11 invoice. The request **MAY** be an amountless invoice only if support for amountless invoices is signaled in the `MeltMethodSettings`.
 
 The mint `Bob` then responds with a `PostMeltQuoteBolt11Response`: