diff --git a/bip-0078.mediawiki b/bip-0078.mediawiki
index 2b069f47f3..2ceeef589f 100644
--- a/bip-0078.mediawiki
+++ b/bip-0078.mediawiki
@@ -131,6 +131,8 @@ This proposal is defining the following new [[bip-0021.mediawiki|BIP 21 URI]] pa
 * <code>pj=</code>: Represents an http(s) endpoint which the sender can POST the original PSBT.
 * <code>pjos=0</code>: Signal to the sender that they MUST disallow [[#output-substitution|payment output substitution]]. (See [[#unsecured-payjoin|Unsecured payjoin server]])
 
+Note: the <code>amount</code> parameter is *not* required.
+
 ===<span id="optional-params"></span>Optional parameters===
 
 When the payjoin sender posts the original PSBT to the receiver, he can optionally specify the following HTTP query string parameters: