diff --git a/src/net.h b/src/net.h
--- a/src/net.h
+++ b/src/net.h
@@ -268,8 +268,6 @@
     bool DisconnectNode(const std::string &node);
     bool DisconnectNode(NodeId id);
 
-    unsigned int GetSendBufferSize() const;
-
     ServiceFlags GetLocalServices() const;
 
     //! set the max outbound target in bytes.
diff --git a/src/net.cpp b/src/net.cpp
--- a/src/net.cpp
+++ b/src/net.cpp
@@ -2830,9 +2830,6 @@
 unsigned int CConnman::GetReceiveFloodSize() const {
     return nReceiveFloodSize;
 }
-unsigned int CConnman::GetSendBufferSize() const {
-    return nSendBufferMaxSize;
-}
 
 CNode::CNode(NodeId idIn, ServiceFlags nLocalServicesIn,
              int nMyStartingHeightIn, SOCKET hSocketIn, const CAddress &addrIn,
diff --git a/src/netaddress.h b/src/netaddress.h
--- a/src/netaddress.h
+++ b/src/netaddress.h
@@ -168,7 +168,6 @@
     CService(const CNetAddr &ip, unsigned short port);
     CService(const struct in_addr &ipv4Addr, unsigned short port);
     CService(const struct sockaddr_in &addr);
-    void SetPort(unsigned short portIn);
     unsigned short GetPort() const;
     bool GetSockAddr(struct sockaddr *paddr, socklen_t *addrlen) const;
     bool SetSockAddr(const struct sockaddr *paddr);
diff --git a/src/netaddress.cpp b/src/netaddress.cpp
--- a/src/netaddress.cpp
+++ b/src/netaddress.cpp
@@ -554,10 +554,6 @@
     return ToStringIPPort();
 }
 
-void CService::SetPort(unsigned short portIn) {
-    port = portIn;
-}
-
 CSubNet::CSubNet() : valid(false) {
     memset(netmask, 0, sizeof(netmask));
 }
diff --git a/src/warnings.h b/src/warnings.h
--- a/src/warnings.h
+++ b/src/warnings.h
@@ -13,7 +13,6 @@
 void SetfLargeWorkForkFound(bool flag);
 bool GetfLargeWorkForkFound();
 void SetfLargeWorkInvalidChainFound(bool flag);
-bool GetfLargeWorkInvalidChainFound();
 std::string GetWarnings(const std::string &strFor);
 
 static const bool DEFAULT_TESTSAFEMODE = false;
diff --git a/src/warnings.cpp b/src/warnings.cpp
--- a/src/warnings.cpp
+++ b/src/warnings.cpp
@@ -33,11 +33,6 @@
     fLargeWorkInvalidChainFound = flag;
 }
 
-bool GetfLargeWorkInvalidChainFound() {
-    LOCK(cs_warnings);
-    return fLargeWorkInvalidChainFound;
-}
-
 std::string GetWarnings(const std::string &strFor) {
     std::string strStatusBar;
     std::string strRPC;