diff --git a/cw_bitcoin/lib/electrum_wallet.dart b/cw_bitcoin/lib/electrum_wallet.dart
index ff075d916..2dd8d698c 100644
--- a/cw_bitcoin/lib/electrum_wallet.dart
+++ b/cw_bitcoin/lib/electrum_wallet.dart
@@ -1154,7 +1154,7 @@ abstract class ElectrumWalletBase
       bool hasTaprootInputs = false;
 
       final transaction = txb.buildTransaction((txDigest, utxo, publicKey, sighash) {
-        return "";
+        if (keys.privateKey.isEmpty) return "";
         String error = "Cannot find private key.";
 
         ECPrivateInfo? key;