4 files changed, 6 insertions, 2 deletions

diff --git a/intern/ghost/intern/GHOST_DisplayManagerWin32.cpp b/intern/ghost/intern/GHOST_DisplayManagerWin32.cpp
index 65d5e650251..252ea775329 100644
--- a/intern/ghost/intern/GHOST_DisplayManagerWin32.cpp
+++ b/intern/ghost/intern/GHOST_DisplayManagerWin32.cpp
@@ -34,6 +34,7 @@
 #include "GHOST_DisplayManagerWin32.h"
 #include "GHOST_Debug.h"
 
+#undef _WIN32_WINNT
 #define _WIN32_WINNT 0x501 // require Windows XP or newer
 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>
diff --git a/intern/ghost/intern/GHOST_SystemPathsWin32.h b/intern/ghost/intern/GHOST_SystemPathsWin32.h
index b63d20bfcbd..5685a57eba8 100644
--- a/intern/ghost/intern/GHOST_SystemPathsWin32.h
+++ b/intern/ghost/intern/GHOST_SystemPathsWin32.h
@@ -37,6 +37,7 @@
 #error WIN32 only!
 #endif // WIN32
 
+#undef _WIN32_WINNT
 #define _WIN32_WINNT 0x501 // require Windows XP or newer
 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>
diff --git a/intern/ghost/intern/GHOST_SystemWin32.h b/intern/ghost/intern/GHOST_SystemWin32.h
index 0a8837294db..3085fde610b 100644
--- a/intern/ghost/intern/GHOST_SystemWin32.h
+++ b/intern/ghost/intern/GHOST_SystemWin32.h
@@ -38,7 +38,8 @@
 #endif // WIN32
 
 #ifndef __MINGW64__
-#define _WIN32_WINNT 0x501 // require Windows XP or newer
+#  undef _WIN32_WINNT
+#  define _WIN32_WINNT 0x501 // require Windows XP or newer
 #endif
 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>
diff --git a/intern/ghost/intern/GHOST_TaskbarWin32.h b/intern/ghost/intern/GHOST_TaskbarWin32.h
index 04196701fe9..6fcff297237 100644
--- a/intern/ghost/intern/GHOST_TaskbarWin32.h
+++ b/intern/ghost/intern/GHOST_TaskbarWin32.h
@@ -9,7 +9,8 @@
 #endif // WIN32
 
 #ifndef __MINGW64__
-#define _WIN32_WINNT 0x501 // require Windows XP or newer
+#  undef _WIN32_WINNT
+#  define _WIN32_WINNT 0x501 // require Windows XP or newer
 #endif
 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>