diff --git a/src/interfaces/wallet.cpp b/src/interfaces/wallet.cpp
--- a/src/interfaces/wallet.cpp
+++ b/src/interfaces/wallet.cpp
@@ -108,7 +108,7 @@
         result.txout = wtx.tx->vout[n];
         result.time = wtx.GetTxTime();
         result.depth_in_main_chain = depth;
-        result.is_spent = wallet.IsSpent(wtx.GetId(), n);
+        result.is_spent = wallet.IsSpent(COutPoint(wtx.GetId(), n));
         return result;
     }
 
@@ -213,7 +213,7 @@
         }
         bool isLockedCoin(const COutPoint &output) override {
             LOCK2(cs_main, m_wallet.cs_wallet);
-            return m_wallet.IsLockedCoin(output.GetTxId(), output.GetN());
+            return m_wallet.IsLockedCoin(output);
         }
         void listLockedCoins(std::vector<COutPoint> &outputs) override {
             LOCK2(cs_main, m_wallet.cs_wallet);
diff --git a/src/wallet/rpcwallet.cpp b/src/wallet/rpcwallet.cpp
--- a/src/wallet/rpcwallet.cpp
+++ b/src/wallet/rpcwallet.cpp
@@ -3038,13 +3038,12 @@
                                "Invalid parameter, vout index out of bounds");
         }
 
-        if (pwallet->IsSpent(outpt.GetTxId(), outpt.GetN())) {
+        if (pwallet->IsSpent(outpt)) {
             throw JSONRPCError(RPC_INVALID_PARAMETER,
                                "Invalid parameter, expected unspent output");
         }
 
-        const bool is_locked =
-            pwallet->IsLockedCoin(outpt.GetTxId(), outpt.GetN());
+        const bool is_locked = pwallet->IsLockedCoin(outpt);
 
         if (fUnlock && !is_locked) {
             throw JSONRPCError(RPC_INVALID_PARAMETER,
diff --git a/src/wallet/wallet.h b/src/wallet/wallet.h
--- a/src/wallet/wallet.h
+++ b/src/wallet/wallet.h
@@ -892,11 +892,11 @@
                             const CoinSelectionParams &coin_selection_params,
                             bool &bnb_used) const;
 
-    bool IsSpent(const TxId &txid, uint32_t n) const;
+    bool IsSpent(const COutPoint &outpoint) const;
     std::vector<OutputGroup> GroupOutputs(const std::vector<COutput> &outputs,
                                           bool single_coin) const;
 
-    bool IsLockedCoin(const TxId &txid, uint32_t n) const;
+    bool IsLockedCoin(const COutPoint &outpoint) const;
     void LockCoin(const COutPoint &output);
     void UnlockCoin(const COutPoint &output);
     void UnlockAllCoins();
diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp
--- a/src/wallet/wallet.cpp
+++ b/src/wallet/wallet.cpp
@@ -652,8 +652,7 @@
 /**
  * Outpoint is spent if any non-conflicted transaction, spends it:
  */
-bool CWallet::IsSpent(const TxId &txid, uint32_t n) const {
-    const COutPoint outpoint(txid, n);
+bool CWallet::IsSpent(const COutPoint &outpoint) const {
     std::pair<TxSpends::const_iterator, TxSpends::const_iterator> range =
         mapTxSpends.equal_range(outpoint);
 
@@ -2033,8 +2032,9 @@
     }
 
     Amount nCredit = Amount::zero();
+    const TxId &txid = GetId();
     for (uint32_t i = 0; i < tx->vout.size(); i++) {
-        if (!pwallet->IsSpent(GetId(), i)) {
+        if (!pwallet->IsSpent(COutPoint(txid, i))) {
             const CTxOut &txout = tx->vout[i];
             nCredit += pwallet->GetCredit(txout, ISMINE_SPENDABLE);
             if (!MoneyRange(nCredit)) {
@@ -2079,8 +2079,9 @@
     }
 
     Amount nCredit = Amount::zero();
+    const TxId &txid = GetId();
     for (uint32_t i = 0; i < tx->vout.size(); i++) {
-        if (!pwallet->IsSpent(GetId(), i)) {
+        if (!pwallet->IsSpent(COutPoint(txid, i))) {
             const CTxOut &txout = tx->vout[i];
             nCredit += pwallet->GetCredit(txout, ISMINE_WATCH_ONLY);
             if (!MoneyRange(nCredit)) {
@@ -2447,17 +2448,19 @@
                 continue;
             }
 
+            const COutPoint outpoint(wtxid, i);
+
             if (coinControl && coinControl->HasSelected() &&
                 !coinControl->fAllowOtherInputs &&
-                !coinControl->IsSelected(COutPoint(entry.first, i))) {
+                !coinControl->IsSelected(outpoint)) {
                 continue;
             }
 
-            if (IsLockedCoin(entry.first, i)) {
+            if (IsLockedCoin(outpoint)) {
                 continue;
             }
 
-            if (IsSpent(wtxid, i)) {
+            if (IsSpent(outpoint)) {
                 continue;
             }
 
@@ -3779,7 +3782,7 @@
                 continue;
             }
 
-            Amount n = IsSpent(walletEntry.first, i)
+            Amount n = IsSpent(COutPoint(walletEntry.first, i))
                            ? Amount::zero()
                            : pcoin->tx->vout[i].nValue;
 
@@ -4013,12 +4016,11 @@
     setLockedCoins.clear();
 }
 
-bool CWallet::IsLockedCoin(const TxId &txid, uint32_t n) const {
+bool CWallet::IsLockedCoin(const COutPoint &outpoint) const {
     // setLockedCoins
     AssertLockHeld(cs_wallet);
-    COutPoint outpt(txid, n);
 
-    return setLockedCoins.count(outpt) > 0;
+    return setLockedCoins.count(outpoint) > 0;
 }
 
 void CWallet::ListLockedCoins(std::vector<COutPoint> &vOutpts) const {