Signed-off-by: Martin Storsjö <[email protected]>
---
 mingw-w64-headers/configure.ac    | 10 ++++++++++
 mingw-w64-headers/crt/_mingw.h.in |  2 +-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/mingw-w64-headers/configure.ac b/mingw-w64-headers/configure.ac
index 84109c9..21259d3 100644
--- a/mingw-w64-headers/configure.ac
+++ b/mingw-w64-headers/configure.ac
@@ -152,6 +152,16 @@ AS_VAR_IF([enable_secure_api],[yes],
   [MINGW_HAS_SECURE_API=""])
 AC_SUBST([MINGW_HAS_SECURE_API])
 
+AC_MSG_CHECKING([default _WIN32_WINNT version])
+AC_ARG_WITH([default-win32-winnt],
+  [AS_HELP_STRING([--with-default-win32-winnt=VER],
+    [Default value of _WIN32_WINNT (default: 0x502)])],
+  [],
+  [with_default_win32_winnt=0x502])
+AC_MSG_RESULT([$with_default_win32_winnt])
+AS_VAR_SET([DEFAULT_WIN32_WINNT],[$with_default_win32_winnt])
+AC_SUBST([DEFAULT_WIN32_WINNT])
+
 # Checks for typedefs, structures, and compiler characteristics.
 
 # Checks for library functions.
diff --git a/mingw-w64-headers/crt/_mingw.h.in 
b/mingw-w64-headers/crt/_mingw.h.in
index 99373b8..c5f3bf8 100644
--- a/mingw-w64-headers/crt/_mingw.h.in
+++ b/mingw-w64-headers/crt/_mingw.h.in
@@ -222,7 +222,7 @@ limitations in handling dllimport attribute.  */
 
 
 #ifndef _WIN32_WINNT
-#define _WIN32_WINNT 0x502
+#define _WIN32_WINNT @DEFAULT_WIN32_WINNT@
 #endif
 
 #ifndef _INT128_DEFINED
-- 
2.7.4


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