4 files changed, 8 insertions, 8 deletions
diff --git a/src/wallet/rpcwallet.cpp b/src/wallet/rpcwallet.cpp
index 094357639b..9a53491838 100644
--- a/src/wallet/rpcwallet.cpp
+++ b/src/wallet/rpcwallet.cpp
@@ -1123,7 +1123,7 @@ public:
     CWallet * const pwallet;
     CScriptID result;
 
-    Witnessifier(CWallet *_pwallet) : pwallet(_pwallet) {}
+    explicit Witnessifier(CWallet *_pwallet) : pwallet(_pwallet) {}
 
     bool operator()(const CNoDestination &dest) const { return false; }
 
diff --git a/src/wallet/test/wallet_test_fixture.h b/src/wallet/test/wallet_test_fixture.h
index 97a6d98397..9373b7907c 100644
--- a/src/wallet/test/wallet_test_fixture.h
+++ b/src/wallet/test/wallet_test_fixture.h
@@ -10,7 +10,7 @@
 /** Testing setup and teardown for wallet.
  */
 struct WalletTestingSetup: public TestingSetup {
-    WalletTestingSetup(const std::string& chainName = CBaseChainParams::MAIN);
+    explicit WalletTestingSetup(const std::string& chainName = CBaseChainParams::MAIN);
     ~WalletTestingSetup();
 };
 
diff --git a/src/wallet/wallet.h b/src/wallet/wallet.h
index f97a99d82a..19e1638d35 100644
--- a/src/wallet/wallet.h
+++ b/src/wallet/wallet.h
@@ -208,7 +208,7 @@ public:
         Init();
     }
 
-    CMerkleTx(CTransactionRef arg)
+    explicit CMerkleTx(CTransactionRef arg)
     {
         SetTx(std::move(arg));
         Init();
@@ -548,7 +548,7 @@ public:
     //! todo: add something to note what created it (user, getnewaddress, change)
     //!   maybe should have a map<string, string> property map
 
-    CWalletKey(int64_t nExpires=0);
+    explicit CWalletKey(int64_t nExpires=0);
 
     ADD_SERIALIZE_METHODS;
 
@@ -765,7 +765,7 @@ public:
     }
 
     // Create wallet with passed-in database handle
-    CWallet(std::unique_ptr<CWalletDBWrapper> dbw_in) : dbw(std::move(dbw_in))
+    explicit CWallet(std::unique_ptr<CWalletDBWrapper> dbw_in) : dbw(std::move(dbw_in))
     {
         SetNull();
     }
@@ -1145,7 +1145,7 @@ protected:
     CPubKey vchPubKey;
     bool fInternal;
 public:
-    CReserveKey(CWallet* pwalletIn)
+    explicit CReserveKey(CWallet* pwalletIn)
     {
         nIndex = -1;
         pwallet = pwalletIn;
diff --git a/src/wallet/walletdb.h b/src/wallet/walletdb.h
index d78f143ebd..e4857f6cab 100644
--- a/src/wallet/walletdb.h
+++ b/src/wallet/walletdb.h
@@ -105,7 +105,7 @@ public:
     {
         SetNull();
     }
-    CKeyMetadata(int64_t nCreateTime_)
+    explicit CKeyMetadata(int64_t nCreateTime_)
     {
         SetNull();
         nCreateTime = nCreateTime_;
@@ -162,7 +162,7 @@ private:
     }
 
 public:
-    CWalletDB(CWalletDBWrapper& dbw, const char* pszMode = "r+", bool _fFlushOnClose = true) :
+    explicit CWalletDB(CWalletDBWrapper& dbw, const char* pszMode = "r+", bool _fFlushOnClose = true) :
         batch(dbw, pszMode, _fFlushOnClose),
         m_dbw(dbw)
     {