diff --git a/src/Gui/3Dconnexion/GuiApplicationNativeEventAwareWin32.cpp b/src/Gui/3Dconnexion/GuiApplicationNativeEventAwareWin32.cpp
index e67b2e989..eeef826be 100644
--- a/src/Gui/3Dconnexion/GuiApplicationNativeEventAwareWin32.cpp
+++ b/src/Gui/3Dconnexion/GuiApplicationNativeEventAwareWin32.cpp
@@ -401,7 +401,16 @@ UINT Gui::GUIApplicationNativeEventAware::GetRawInputBuffer(PRAWINPUT pData, PUI
 	return ::GetRawInputBuffer(pData, pcbSize, cbSizeHeader);
 #else
 	BOOL bIsWow64 = FALSE;
-	::IsWow64Process(GetCurrentProcess(), &bIsWow64);
+	// 0002287: Entry Point Not Found IsWow64Process for Windows 2000
+	//::IsWow64Process(GetCurrentProcess(), &bIsWow64);
+	typedef BOOL (WINAPI *LPFN_ISWOW64PROCESS) (HANDLE, PBOOL);
+
+	LPFN_ISWOW64PROCESS fnIsWow64Process = (LPFN_ISWOW64PROCESS) GetProcAddress(
+		GetModuleHandle("kernel32"), "IsWow64Process");
+
+	if (NULL != fnIsWow64Process) {
+		fnIsWow64Process(GetCurrentProcess(), &bIsWow64);
+	}
 	if (!bIsWow64 || pData==NULL) {
 		return ::GetRawInputBuffer(pData, pcbSize, cbSizeHeader);
 	} else {
diff --git a/src/Gui/Splashscreen.cpp b/src/Gui/Splashscreen.cpp
index 98249c608..81d1e3dfc 100644
--- a/src/Gui/Splashscreen.cpp
+++ b/src/Gui/Splashscreen.cpp
@@ -309,9 +309,6 @@ static QString getOperatingSystem()
 #endif
 }
 
-#if defined(Q_OS_WIN32) || defined(Q_OS_WIN64)
-typedef BOOL (WINAPI *LPFN_ISWOW64PROCESS) (HANDLE, PBOOL);
-#endif
 static int getWordSizeOfOS()
 {
 #if defined(Q_OS_WIN64)
@@ -323,6 +320,7 @@ static int getWordSizeOfOS()
     // default bIsWow64 to FALSE for 32-bit process on 32-bit windows
 
     BOOL bIsWow64 = FALSE; // must default to FALSE
+    typedef BOOL (WINAPI *LPFN_ISWOW64PROCESS) (HANDLE, PBOOL);
 
     LPFN_ISWOW64PROCESS fnIsWow64Process = (LPFN_ISWOW64PROCESS) GetProcAddress(
         GetModuleHandle("kernel32"), "IsWow64Process");