diff --git a/src/lib/bitcoin/btc-base-api.js b/src/lib/bitcoin/btc-base-api.js
index 4567c63dc..b7a6f483a 100644
--- a/src/lib/bitcoin/btc-base-api.js
+++ b/src/lib/bitcoin/btc-base-api.js
@@ -91,7 +91,7 @@ export default class BtcBaseApi {
       unspent.txHex = await this.getTransactionHex(unspent.txid)
     }
 
-    const hex = this._buildTransaction(address, amount, unspents, fee)
+    const hex = await this.buildTransaction(address, amount, unspents, fee)
 
     let txid = bitcoin.crypto.sha256(Buffer.from(hex, 'hex'))
     txid = bitcoin.crypto.sha256(Buffer.from(txid))
@@ -150,7 +150,7 @@ export default class BtcBaseApi {
    * @param {number} fee transaction fee in primary units (BTC, DOGE, DASH, etc)
    * @returns {string}
    */
-  _buildTransaction(address, amount, unspents, fee) {
+  buildTransaction(address, amount, unspents, fee) {
     amount = new BigNumber(amount).times(this.multiplier).toNumber()
     amount = Math.floor(amount)
 
diff --git a/src/lib/bitcoin/doge-api.js b/src/lib/bitcoin/doge-api.js
index 60f36c8da..a2d50c11e 100644
--- a/src/lib/bitcoin/doge-api.js
+++ b/src/lib/bitcoin/doge-api.js
@@ -42,7 +42,7 @@ export default class DogeApi extends BtcBaseApi {
   }
 
   /** @override */
-  async _buildTransaction(address, amount, unspents, fee) {
+  async buildTransaction(address, amount, unspents, fee) {
     const localAmount = convertToSmallestUnit(amount, this.multiplier)
     const heldFee = convertToSmallestUnit(fee, this.multiplier)