diff --git a/src/corelib/global/qoperatingsystemversion_win.cpp b/src/corelib/global/qoperatingsystemversion_win.cpp
index f3662ae1f9..7659fb2550 100644
--- a/src/corelib/global/qoperatingsystemversion_win.cpp
+++ b/src/corelib/global/qoperatingsystemversion_win.cpp
@@ -97,7 +97,7 @@ static inline OSVERSIONINFOEX determineWinOsVersion()
     // because linking to it at load time will not pass the Windows App Certification Kit
     // https://msdn.microsoft.com/en-us/library/windows/hardware/ff561910.aspx
     RtlGetVersionFunction pRtlGetVersion = reinterpret_cast<RtlGetVersionFunction>(
-        GetProcAddressA(ntdll, "RtlGetVersion"));
+        reinterpret_cast<QFunctionPointer>(GetProcAddressA(ntdll, "RtlGetVersion")));
     if (Q_UNLIKELY(!pRtlGetVersion))
         return result;
 
diff --git a/src/corelib/io/qlockfile_win.cpp b/src/corelib/io/qlockfile_win.cpp
index 6b8028460c..277f8d4230 100644
--- a/src/corelib/io/qlockfile_win.cpp
+++ b/src/corelib/io/qlockfile_win.cpp
@@ -153,9 +153,8 @@ QString QLockFilePrivate::processNameByPid(qint64 pid)
     HMODULE hPsapi = LoadLibraryA("psapi");
     if (!hPsapi)
         return QString();
-
-    GetModuleFileNameExFunc qGetModuleFileNameEx
-            = (GetModuleFileNameExFunc)GetProcAddress(hPsapi, "GetModuleFileNameExW");
+    GetModuleFileNameExFunc qGetModuleFileNameEx = reinterpret_cast<GetModuleFileNameExFunc>(
+        reinterpret_cast<QFunctionPointer>(GetProcAddress(hPsapi, "GetModuleFileNameExW")));
     if (!qGetModuleFileNameEx) {
         FreeLibrary(hPsapi);
         return QString();
diff --git a/src/network/kernel/qauthenticator.cpp b/src/network/kernel/qauthenticator.cpp
index a3ccf13e82..c995e3fef2 100644
--- a/src/network/kernel/qauthenticator.cpp
+++ b/src/network/kernel/qauthenticator.cpp
@@ -1454,8 +1454,8 @@ static bool q_NTLM_SSPI_library_load()
         securityDLLHandle = LoadLibrary(L"secur32.dll");
         if (securityDLLHandle != NULL) {
             INIT_SECURITY_INTERFACE pInitSecurityInterface =
-            (INIT_SECURITY_INTERFACE)GetProcAddress(securityDLLHandle,
-                                                    "InitSecurityInterfaceW");
+                reinterpret_cast<INIT_SECURITY_INTERFACE>(
+                    reinterpret_cast<QFunctionPointer>(GetProcAddress(securityDLLHandle, "InitSecurityInterfaceW")));
             if (pInitSecurityInterface != NULL)
                 pSecurityFunctionTable = pInitSecurityInterface();
         }
diff --git a/src/testlib/qtestcase.cpp b/src/testlib/qtestcase.cpp
index acd676833e..f5668c274e 100644
--- a/src/testlib/qtestcase.cpp
+++ b/src/testlib/qtestcase.cpp
@@ -1603,8 +1603,10 @@ DebugSymbolResolver::DebugSymbolResolver(HANDLE process)
     bool success = false;
     m_dbgHelpLib = LoadLibraryW(L"dbghelp.dll");
     if (m_dbgHelpLib) {
-        SymInitializeType symInitialize = (SymInitializeType)(GetProcAddress(m_dbgHelpLib, "SymInitialize"));
-        m_symFromAddr = (SymFromAddrType)(GetProcAddress(m_dbgHelpLib, "SymFromAddr"));
+        SymInitializeType symInitialize = reinterpret_cast<SymInitializeType>(
+            reinterpret_cast<QFunctionPointer>(GetProcAddress(m_dbgHelpLib, "SymInitialize")));
+        m_symFromAddr = reinterpret_cast<SymFromAddrType>(
+            reinterpret_cast<QFunctionPointer>(GetProcAddress(m_dbgHelpLib, "SymFromAddr")));
         success = symInitialize && m_symFromAddr && symInitialize(process, NULL, TRUE);
     }
     if (!success)