diff --git a/modules/utxo-lib/src/bitgo/PsbtUtil.ts b/modules/utxo-lib/src/bitgo/PsbtUtil.ts
index d3f2cf6fff..fd1bd5c32a 100644
--- a/modules/utxo-lib/src/bitgo/PsbtUtil.ts
+++ b/modules/utxo-lib/src/bitgo/PsbtUtil.ts
@@ -21,6 +21,7 @@ export enum ProprietaryKeySubtype {
   MUSIG2_PUB_NONCE = 0x02,
   MUSIG2_PARTIAL_SIG = 0x03,
   PAYGO_ADDRESS_ATTESTATION_PROOF = 0x04,
+  BIP322_MESSAGE = 0x05,
 }
 
 /**