diff --git a/lib/wallet/walletdb.js b/lib/wallet/walletdb.js
index 7e637625..6a122fd0 100644
--- a/lib/wallet/walletdb.js
+++ b/lib/wallet/walletdb.js
@@ -1529,7 +1529,7 @@ WalletDB.prototype.resendPending = async function resendPending(wid) {
 
 WalletDB.prototype.getWalletsByTX = async function getWalletsByTX(tx) {
   let hashes = tx.getOutputHashes('hex');
-  let result = [];
+  let result = new Set();
 
   if (!tx.isCoinbase()) {
     for (let input of tx.inputs) {
@@ -1545,7 +1545,7 @@ WalletDB.prototype.getWalletsByTX = async function getWalletsByTX(tx) {
         continue;
 
       for (let wid of map.wids)
-        util.binaryInsert(result, wid, cmp, true);
+        result.add(wid);
     }
   }
 
@@ -1561,10 +1561,10 @@ WalletDB.prototype.getWalletsByTX = async function getWalletsByTX(tx) {
       continue;
 
     for (let wid of map.wids)
-      util.binaryInsert(result, wid, cmp, true);
+      result.add(wid);
   }
 
-  if (result.length === 0)
+  if (result.size === 0)
     return;
 
   return result;