diff --git a/configure.in b/configure.in
index c71bd12d7f25..9a149ddc52ac 100644
--- a/configure.in
+++ b/configure.in
@@ -1731,8 +1731,8 @@ case "$target" in
     AC_DEFINE(XP_WIN)
     AC_DEFINE(XP_WIN32)
     AC_DEFINE(HW_THREADS)
-    AC_DEFINE_UNQUOTED(WINVER,0x400)
-    AC_DEFINE_UNQUOTED(_WIN32_WINNT,0x400)
+    AC_DEFINE_UNQUOTED(WINVER,0x500)
+    AC_DEFINE_UNQUOTED(_WIN32_WINNT,0x500)
     AC_DEFINE(STDC_HEADERS)
     AC_DEFINE(NEW_H, <new>)
     AC_DEFINE(WIN32_LEAN_AND_MEAN)