diff --git a/19.md b/19.md
index a2b82e3..9fc2aca 100644
--- a/19.md
+++ b/19.md
@@ -35,7 +35,8 @@ The mint `Bob` then responds with a `PostMintQuoteBolt11Response`:
   "quote": <str>,
   "request": <str>,
   "state": <str_enum[STATE]>,
-  "expiry": <int>
+  "expiry": <int>,
+  "pubkey": <str|null> <-- New
 }
 ```
 
@@ -61,7 +62,8 @@ Response of `Bob`:
   "quote": "9d745270-1405-46de-b5c5-e2762b4f5e00",
   "request": "lnbc100n1pj4apw9...",
   "state": "UNPAID",
-  "expiry": 1701704757
+  "expiry": 1701704757,
+  "pubkey": "03d56ce4e446a85bbdaa547b4ec2b073d40ff802831352b8272b7dd7a4de5a7cac"
 }
 ```
 
diff --git a/error_codes.md b/error_codes.md
index 41e1c40..d746e01 100644
--- a/error_codes.md
+++ b/error_codes.md
@@ -16,8 +16,8 @@
 | 20005 | Quote is pending                                | [NUT-04][04], [NUT-05][05]               |
 | 20006 | Invoice already paid                            | [NUT-05][05]                             |
 | 20007 | Quote is expired                                | [NUT-04][04], [NUT-05][05]               |
-| 20008 | Invalid witness                                 | [NUT-19][19]                             |
-| 20009 | Witness not provided for mint quote             | [NUT-19][19]                             |
+| 20008 | Witness on mint request not provided or invalid | [NUT-19][19]                             |
+| 20009 | Pubkey required on mint quote                   | [NUT-19][19]                             |
 
 [00]: 00.md
 [01]: 01.md