diff --git a/nbase/nbase_winconfig.h b/nbase/nbase_winconfig.h
index 3dd26638f..97ef669bc 100644
--- a/nbase/nbase_winconfig.h
+++ b/nbase/nbase_winconfig.h
@@ -126,6 +126,17 @@
 
 #ifndef NBASE_WINCONFIG_H
 #define NBASE_WINCONFIG_H
+
+/* Define the earliest version of Windows we support.  These control
+what parts of the Windows API are available. The available constants
+are in <sdkddkver.h>.
+http://msdn.microsoft.com/en-us/library/aa383745.aspx
+http://blogs.msdn.com/oldnewthing/archive/2007/04/11/2079137.aspx */
+#undef _WIN32_WINNT
+#define _WIN32_WINNT _WIN32_WINNT_WIN6
+#undef NTDDI_VERSION
+#define NTDDI_VERSION NTDDI_WIN6
+
 //This disables the warning 4800 http://msdn.microsoft.com/en-us/library/b6801kcy(v=vs.71).aspx
 #pragma warning(disable : 4800)
 /* It doesn't really have struct IP, but we use a different one instead
diff --git a/nbase/nbase_winunix.h b/nbase/nbase_winunix.h
index 79dbcfc2c..39e94dca5 100644
--- a/nbase/nbase_winunix.h
+++ b/nbase/nbase_winunix.h
@@ -125,15 +125,6 @@
 #ifndef NBASE_WINUNIX_H
 #define NBASE_WINUNIX_H
 
-/* Define the earliest version of Windows we support.  These control
-   what parts of the Windows API are available. The available constants
-   are in <sdkddkver.h>.
-   http://msdn.microsoft.com/en-us/library/aa383745.aspx
-   http://blogs.msdn.com/oldnewthing/archive/2007/04/11/2079137.aspx */
-#undef _WIN32_WINNT
-#define _WIN32_WINNT _WIN32_WINNT_WIN6
-#undef NTDDI_VERSION
-#define NTDDI_VERSION NTDDI_WIN6
 
 #include "nbase_winconfig.h"