diff --git a/CMakeLists.txt b/CMakeLists.txt
index f05d9f6ec..2bb3196b7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -344,6 +344,10 @@ ENDIF()
 
 
 IF(WIN32 AND NOT ANDROID)
+    # Check window version
+    INCLUDE (OsgDetermineWinVersion)
+    get_WIN32_WINNT(WIN_VERSION)
+    ADD_DEFINITIONS(-D_WIN32_WINNT=${WIN_VERSION})
 
     IF(MSVC)
         # This option is to enable the /MP switch for Visual Studio 2005 and above compilers
diff --git a/CMakeModules/OsgDetermineWinVersion.cmake b/CMakeModules/OsgDetermineWinVersion.cmake
new file mode 100644
index 000000000..dbf9554a9
--- /dev/null
+++ b/CMakeModules/OsgDetermineWinVersion.cmake
@@ -0,0 +1,22 @@
+# - If Windows is used, this script sets the variable WIN32_WINNT to the corresponding windows version
+
+if (WIN32)
+  message(STATUS "Checking windows version...")
+    macro(get_WIN32_WINNT version)
+        if (CMAKE_SYSTEM_VERSION)
+            set(ver ${CMAKE_SYSTEM_VERSION})
+            string(REGEX MATCH "^([0-9]+).([0-9])" ver ${ver})
+            string(REGEX MATCH "^([0-9]+)" verMajor ${ver})
+            # Check for Windows 10, b/c we'll need to convert to hex 'A'.
+            if ("${verMajor}" MATCHES "10")
+                set(verMajor "A")
+                string(REGEX REPLACE "^([0-9]+)" ${verMajor} ver ${ver})
+            endif ("${verMajor}" MATCHES "10")
+            # Remove all remaining '.' characters.
+            string(REPLACE "." "" ver ${ver})
+            # Prepend each digit with a zero.
+            string(REGEX REPLACE "([0-9A-Z])" "0\\1" ver ${ver})
+            set(${version} "0x${ver}")
+        endif(CMAKE_SYSTEM_VERSION)
+    endmacro(get_WIN32_WINNT)
+endif(WIN32)
\ No newline at end of file
diff --git a/include/osgViewer/api/Win32/GraphicsHandleWin32 b/include/osgViewer/api/Win32/GraphicsHandleWin32
index f6ac8fa28..5959e6bf2 100644
--- a/include/osgViewer/api/Win32/GraphicsHandleWin32
+++ b/include/osgViewer/api/Win32/GraphicsHandleWin32
@@ -16,8 +16,17 @@
 
 #include <osgViewer/Export>
 
+// Fallback if not correctly detected in CMake macro
 #ifndef _WIN32_WINNT
-#define _WIN32_WINNT    0x0500
+//#define _WIN32_WINNT    0x0A00 // Windows 10
+//#define _WIN32_WINNT    0x0603 // Windows 8.1
+//#define _WIN32_WINNT    0x0602 // Windows 8
+//#define _WIN32_WINNT    0x0601 // Windows 7
+//#define _WIN32_WINNT    0x0600 // Windows Server 2008
+//#define _WIN32_WINNT    0x0600 // Windows Vista
+//#define _WIN32_WINNT    0x0502 // Windows Server 2003 with SP1, Windows XP with SP2
+//#define _WIN32_WINNT    0x0501 // Windows Server 2003, Windows XP
+#define _WIN32_WINNT    0x0500 // Windows NT
 #endif
 #include <windows.h>