diff --git a/src/net_processing.h b/src/net_processing.h
index 4b7e5b075..f460595bc 100644
--- a/src/net_processing.h
+++ b/src/net_processing.h
@@ -30,10 +30,10 @@ private:
 public:
     PeerLogicValidation(CConnman* connmanIn);
 
-    virtual void BlockConnected(const std::shared_ptr<const CBlock>& pblock, const CBlockIndex* pindexConnected, const std::vector<CTransactionRef>& vtxConflicted);
-    virtual void UpdatedBlockTip(const CBlockIndex *pindexNew, const CBlockIndex *pindexFork, bool fInitialDownload);
-    virtual void BlockChecked(const CBlock& block, const CValidationState& state);
-    virtual void NewPoWValidBlock(const CBlockIndex *pindex, const std::shared_ptr<const CBlock>& pblock);
+    void BlockConnected(const std::shared_ptr<const CBlock>& pblock, const CBlockIndex* pindexConnected, const std::vector<CTransactionRef>& vtxConflicted) override;
+    void UpdatedBlockTip(const CBlockIndex *pindexNew, const CBlockIndex *pindexFork, bool fInitialDownload) override;
+    void BlockChecked(const CBlock& block, const CValidationState& state) override;
+    void NewPoWValidBlock(const CBlockIndex *pindex, const std::shared_ptr<const CBlock>& pblock) override;
 };
 
 struct CNodeStateStats {
diff --git a/src/rpc/mining.cpp b/src/rpc/mining.cpp
index 7e5f0d608..cf7ca650b 100644
--- a/src/rpc/mining.cpp
+++ b/src/rpc/mining.cpp
@@ -710,7 +710,7 @@ public:
     submitblock_StateCatcher(const uint256 &hashIn) : hash(hashIn), found(false), state() {}
 
 protected:
-    virtual void BlockChecked(const CBlock& block, const CValidationState& stateIn) {
+    void BlockChecked(const CBlock& block, const CValidationState& stateIn) override {
         if (block.GetHash() != hash)
             return;
         found = true;
diff --git a/src/zmq/zmqnotificationinterface.h b/src/zmq/zmqnotificationinterface.h
index 7d765d409..eec6f7bc6 100644
--- a/src/zmq/zmqnotificationinterface.h
+++ b/src/zmq/zmqnotificationinterface.h
@@ -25,10 +25,10 @@ protected:
     void Shutdown();
 
     // CValidationInterface
-    void TransactionAddedToMempool(const CTransactionRef& tx);
-    void BlockConnected(const std::shared_ptr<const CBlock>& pblock, const CBlockIndex* pindexConnected, const std::vector<CTransactionRef>& vtxConflicted);
-    void BlockDisconnected(const std::shared_ptr<const CBlock>& pblock);
-    void UpdatedBlockTip(const CBlockIndex *pindexNew, const CBlockIndex *pindexFork, bool fInitialDownload);
+    void TransactionAddedToMempool(const CTransactionRef& tx) override;
+    void BlockConnected(const std::shared_ptr<const CBlock>& pblock, const CBlockIndex* pindexConnected, const std::vector<CTransactionRef>& vtxConflicted) override;
+    void BlockDisconnected(const std::shared_ptr<const CBlock>& pblock) override;
+    void UpdatedBlockTip(const CBlockIndex *pindexNew, const CBlockIndex *pindexFork, bool fInitialDownload) override;
 
 private:
     CZMQNotificationInterface();