diff --git a/src/addrdb.cpp b/src/addrdb.cpp
index 835c5d6c65b..f3e8a19de22 100644
--- a/src/addrdb.cpp
+++ b/src/addrdb.cpp
@@ -8,6 +8,7 @@
 #include <addrman.h>
 #include <chainparams.h>
 #include <clientversion.h>
+#include <cstdint>
 #include <hash.h>
 #include <random.h>
 #include <streams.h>
@@ -36,7 +37,7 @@ template <typename Data>
 bool SerializeFileDB(const std::string& prefix, const fs::path& path, const Data& data)
 {
     // Generate random temporary filename
-    unsigned short randv = 0;
+    uint16_t randv = 0;
     GetRandBytes((unsigned char*)&randv, sizeof(randv));
     std::string tmpfn = strprintf("%s.%04x", prefix, randv);
 
diff --git a/src/net.cpp b/src/net.cpp
index 21d340b5161..0cafb57e80d 100644
--- a/src/net.cpp
+++ b/src/net.cpp
@@ -42,6 +42,7 @@
 static_assert(MINIUPNPC_API_VERSION >= 10, "miniUPnPc API version >= 10 assumed");
 #endif
 
+#include <cstdint>
 #include <unordered_map>
 
 #include <math.h>
@@ -110,9 +111,9 @@ void CConnman::AddOneShot(const std::string& strDest)
     vOneShots.push_back(strDest);
 }
 
-unsigned short GetListenPort()
+uint16_t GetListenPort()
 {
-    return (unsigned short)(gArgs.GetArg("-port", Params().GetDefaultPort()));
+    return (uint16_t)(gArgs.GetArg("-port", Params().GetDefaultPort()));
 }
 
 // find 'best' local address for a particular peer
diff --git a/src/net.h b/src/net.h
index 3c237639545..b6c70ec0680 100644
--- a/src/net.h
+++ b/src/net.h
@@ -25,8 +25,8 @@
 #include <uint256.h>
 
 #include <atomic>
+#include <cstdint>
 #include <deque>
-#include <stdint.h>
 #include <thread>
 #include <memory>
 #include <condition_variable>
@@ -482,7 +482,7 @@ void Discover();
 void StartMapPort();
 void InterruptMapPort();
 void StopMapPort();
-unsigned short GetListenPort();
+uint16_t GetListenPort();
 
 struct CombinerAll
 {
diff --git a/src/netaddress.cpp b/src/netaddress.cpp
index f79425a52ea..6744391616e 100644
--- a/src/netaddress.cpp
+++ b/src/netaddress.cpp
@@ -3,6 +3,7 @@
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
+#include <cstdint>
 #include <netaddress.h>
 #include <hash.h>
 #include <util/strencodings.h>
@@ -627,15 +628,15 @@ CService::CService() : port(0)
 {
 }
 
-CService::CService(const CNetAddr& cip, unsigned short portIn) : CNetAddr(cip), port(portIn)
+CService::CService(const CNetAddr& cip, uint16_t portIn) : CNetAddr(cip), port(portIn)
 {
 }
 
-CService::CService(const struct in_addr& ipv4Addr, unsigned short portIn) : CNetAddr(ipv4Addr), port(portIn)
+CService::CService(const struct in_addr& ipv4Addr, uint16_t portIn) : CNetAddr(ipv4Addr), port(portIn)
 {
 }
 
-CService::CService(const struct in6_addr& ipv6Addr, unsigned short portIn) : CNetAddr(ipv6Addr), port(portIn)
+CService::CService(const struct in6_addr& ipv6Addr, uint16_t portIn) : CNetAddr(ipv6Addr), port(portIn)
 {
 }
 
@@ -663,7 +664,7 @@ bool CService::SetSockAddr(const struct sockaddr *paddr)
     }
 }
 
-unsigned short CService::GetPort() const
+uint16_t CService::GetPort() const
 {
     return port;
 }
diff --git a/src/netaddress.h b/src/netaddress.h
index 552abc4119e..c201012154b 100644
--- a/src/netaddress.h
+++ b/src/netaddress.h
@@ -12,7 +12,7 @@
 #include <compat.h>
 #include <serialize.h>
 
-#include <stdint.h>
+#include <cstdint>
 #include <string>
 #include <vector>
 
@@ -143,10 +143,10 @@ class CService : public CNetAddr
 
     public:
         CService();
-        CService(const CNetAddr& ip, unsigned short port);
-        CService(const struct in_addr& ipv4Addr, unsigned short port);
+        CService(const CNetAddr& ip, uint16_t port);
+        CService(const struct in_addr& ipv4Addr, uint16_t port);
         explicit CService(const struct sockaddr_in& addr);
-        unsigned short GetPort() const;
+        uint16_t GetPort() const;
         bool GetSockAddr(struct sockaddr* paddr, socklen_t *addrlen) const;
         bool SetSockAddr(const struct sockaddr* paddr);
         friend bool operator==(const CService& a, const CService& b);
@@ -157,7 +157,7 @@ class CService : public CNetAddr
         std::string ToStringPort() const;
         std::string ToStringIPPort() const;
 
-        CService(const struct in6_addr& ipv6Addr, unsigned short port);
+        CService(const struct in6_addr& ipv6Addr, uint16_t port);
         explicit CService(const struct sockaddr_in6& addr);
 
         SERIALIZE_METHODS(CService, obj) { READWRITE(obj.ip, Using<BigEndianFormatter<2>>(obj.port)); }
diff --git a/src/netbase.cpp b/src/netbase.cpp
index 9fe03c6a246..3a3b5f3e668 100644
--- a/src/netbase.cpp
+++ b/src/netbase.cpp
@@ -12,6 +12,7 @@
 #include <util/system.h>
 
 #include <atomic>
+#include <cstdint>
 
 #ifndef WIN32
 #include <fcntl.h>
@@ -798,11 +799,11 @@ bool ConnectThroughProxy(const proxyType &proxy, const std::string& strDest, int
         ProxyCredentials random_auth;
         static std::atomic_int counter(0);
         random_auth.username = random_auth.password = strprintf("%i", counter++);
-        if (!Socks5(strDest, (unsigned short)port, &random_auth, hSocket)) {
+        if (!Socks5(strDest, (uint16_t)port, &random_auth, hSocket)) {
             return false;
         }
     } else {
-        if (!Socks5(strDest, (unsigned short)port, 0, hSocket)) {
+        if (!Socks5(strDest, (uint16_t)port, 0, hSocket)) {
             return false;
         }
     }
diff --git a/src/qt/optionsmodel.h b/src/qt/optionsmodel.h
index 6ca5ac9d753..14fdf9046e6 100644
--- a/src/qt/optionsmodel.h
+++ b/src/qt/optionsmodel.h
@@ -6,6 +6,7 @@
 #define BITCOIN_QT_OPTIONSMODEL_H
 
 #include <amount.h>
+#include <cstdint>
 #include <qt/guiconstants.h>
 
 #include <QAbstractListModel>
@@ -15,7 +16,7 @@ class Node;
 }
 
 extern const char *DEFAULT_GUI_PROXY_HOST;
-static constexpr unsigned short DEFAULT_GUI_PROXY_PORT = 9050;
+static constexpr uint16_t DEFAULT_GUI_PROXY_PORT = 9050;
 
 /**
  * Convert configured prune target MiB to displayed GB. Round up to avoid underestimating max disk usage.
diff --git a/src/serialize.h b/src/serialize.h
index 71c2cfa164f..7a94e704b2d 100644
--- a/src/serialize.h
+++ b/src/serialize.h
@@ -9,13 +9,13 @@
 #include <compat/endian.h>
 
 #include <algorithm>
+#include <cstdint>
 #include <cstring>
 #include <ios>
 #include <limits>
 #include <map>
 #include <memory>
 #include <set>
-#include <stdint.h>
 #include <string>
 #include <string.h>
 #include <utility>
@@ -272,7 +272,7 @@ template<typename Stream> inline void Unserialize(Stream& s, bool& a) { char f=s
 inline unsigned int GetSizeOfCompactSize(uint64_t nSize)
 {
     if (nSize < 253)             return sizeof(unsigned char);
-    else if (nSize <= std::numeric_limits<unsigned short>::max()) return sizeof(unsigned char) + sizeof(unsigned short);
+    else if (nSize <= std::numeric_limits<uint16_t>::max()) return sizeof(unsigned char) + sizeof(uint16_t);
     else if (nSize <= std::numeric_limits<unsigned int>::max())  return sizeof(unsigned char) + sizeof(unsigned int);
     else                         return sizeof(unsigned char) + sizeof(uint64_t);
 }
@@ -286,7 +286,7 @@ void WriteCompactSize(Stream& os, uint64_t nSize)
     {
         ser_writedata8(os, nSize);
     }
-    else if (nSize <= std::numeric_limits<unsigned short>::max())
+    else if (nSize <= std::numeric_limits<uint16_t>::max())
     {
         ser_writedata8(os, 253);
         ser_writedata16(os, nSize);
diff --git a/src/test/net_tests.cpp b/src/test/net_tests.cpp
index 84bf5934971..ab42be21bd8 100644
--- a/src/test/net_tests.cpp
+++ b/src/test/net_tests.cpp
@@ -6,6 +6,7 @@
 #include <addrman.h>
 #include <chainparams.h>
 #include <clientversion.h>
+#include <cstdint>
 #include <net.h>
 #include <netbase.h>
 #include <serialize.h>
@@ -83,10 +84,10 @@ BOOST_FIXTURE_TEST_SUITE(net_tests, BasicTestingSetup)
 BOOST_AUTO_TEST_CASE(cnode_listen_port)
 {
     // test default
-    unsigned short port = GetListenPort();
+    uint16_t port = GetListenPort();
     BOOST_CHECK(port == Params().GetDefaultPort());
     // test set port
-    unsigned short altPort = 12345;
+    uint16_t altPort = 12345;
     BOOST_CHECK(gArgs.SoftSetArg("-port", ToString(altPort)));
     port = GetListenPort();
     BOOST_CHECK(port == altPort);