diff --git a/src/bitcoin-tx.cpp b/src/bitcoin-tx.cpp
index 8e8ac47455..5cf9b043ea 100644
--- a/src/bitcoin-tx.cpp
+++ b/src/bitcoin-tx.cpp
@@ -395,10 +395,8 @@ static void MutateTxSign(CMutableTransaction& tx, const string& flagStr)
 
     if (!registers.count("privatekeys"))
         throw runtime_error("privatekeys register variable must be set.");
-    bool fGivenKeys = false;
     CBasicKeyStore tempKeystore;
     UniValue keysObj = registers["privatekeys"];
-    fGivenKeys = true;
 
     for (unsigned int kidx = 0; kidx < keysObj.size(); kidx++) {
         if (!keysObj[kidx].isStr())
@@ -454,7 +452,7 @@ static void MutateTxSign(CMutableTransaction& tx, const string& flagStr)
 
             // if redeemScript given and private keys given,
             // add redeemScript to the tempKeystore so it can be signed:
-            if (fGivenKeys && (scriptPubKey.IsPayToScriptHash() || scriptPubKey.IsPayToWitnessScriptHash()) &&
+            if ((scriptPubKey.IsPayToScriptHash() || scriptPubKey.IsPayToWitnessScriptHash()) &&
                 prevOut.exists("redeemScript")) {
                 UniValue v = prevOut["redeemScript"];
                 vector<unsigned char> rsData(ParseHexUV(v, "redeemScript"));
diff --git a/src/init.cpp b/src/init.cpp
index 13c68e512a..65ae4dbd9d 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -1183,8 +1183,8 @@ bool AppInit2(boost::thread_group& threadGroup, CScheduler& scheduler)
     fNameLookup = GetBoolArg("-dns", DEFAULT_NAME_LOOKUP);
     fRelayTxes = !GetBoolArg("-blocksonly", DEFAULT_BLOCKSONLY);
 
-    bool fBound = false;
     if (fListen) {
+        bool fBound = false;
         if (mapArgs.count("-bind") || mapArgs.count("-whitebind")) {
             BOOST_FOREACH(const std::string& strBind, mapMultiArgs["-bind"]) {
                 CService addrBind;
diff --git a/src/txmempool.cpp b/src/txmempool.cpp
index b631c48484..0a00d757a2 100644
--- a/src/txmempool.cpp
+++ b/src/txmempool.cpp
@@ -576,7 +576,6 @@ void CTxMemPool::removeForReorg(const CCoinsViewCache *pcoins, unsigned int nMem
 void CTxMemPool::removeConflicts(const CTransaction &tx, std::list<CTransaction>& removed)
 {
     // Remove transactions which depend on inputs of tx, recursively
-    list<CTransaction> result;
     LOCK(cs);
     BOOST_FOREACH(const CTxIn &txin, tx.vin) {
         auto it = mapNextTx.find(txin.prevout);
diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp
index 769322969d..10aca2e499 100644
--- a/src/wallet/wallet.cpp
+++ b/src/wallet/wallet.cpp
@@ -2461,7 +2461,6 @@ bool CWallet::CommitTransaction(CWalletTx& wtxNew, CReserveKey& reservekey)
             AddToWallet(wtxNew);
 
             // Notify that old coins are spent
-            set<CWalletTx*> setCoins;
             BOOST_FOREACH(const CTxIn& txin, wtxNew.vin)
             {
                 CWalletTx &coin = mapWallet[txin.prevout.hash];