diff --git a/modules/abstract-utxo/src/abstractUtxoCoin.ts b/modules/abstract-utxo/src/abstractUtxoCoin.ts
index 28084b9d1d..0289c6a8df 100644
--- a/modules/abstract-utxo/src/abstractUtxoCoin.ts
+++ b/modules/abstract-utxo/src/abstractUtxoCoin.ts
@@ -1442,7 +1442,11 @@ export abstract class AbstractUtxoCoin extends BaseCoin {
     };
   }
 
-  async getExtraPrebuildParams(buildParams: ExtraPrebuildParamsOptions): Promise<any> {
+  async getExtraPrebuildParams(buildParams: ExtraPrebuildParamsOptions & { wallet: Wallet }): Promise<any> {
+    if (buildParams.wallet.subType() === 'distributedCustody') {
+      return { txFormat: 'psbt' };
+    }
+
     return {};
   }
 
diff --git a/modules/sdk-core/src/bitgo/wallet/wallet.ts b/modules/sdk-core/src/bitgo/wallet/wallet.ts
index abbd326cb8..97de9bdffe 100644
--- a/modules/sdk-core/src/bitgo/wallet/wallet.ts
+++ b/modules/sdk-core/src/bitgo/wallet/wallet.ts
@@ -72,6 +72,7 @@ import {
   ShareWalletOptions,
   SimulateWebhookOptions,
   SubmitTransactionOptions,
+  SubWalletType,
   SweepOptions,
   TransferBySequenceIdOptions,
   TransferCommentOptions,
@@ -251,6 +252,10 @@ export class Wallet implements IWallet {
     return this._wallet.multisigType;
   }
 
+  subType(): SubWalletType | undefined {
+    return this._wallet.subType;
+  }
+
   /**
    * Get the label (name) for this wallet
    */