diff --git a/include/fmt/format-inl.h b/include/fmt/format-inl.h
index f50c2da1..b35bbd62 100644
--- a/include/fmt/format-inl.h
+++ b/include/fmt/format-inl.h
@@ -23,14 +23,14 @@
 #endif
 
 #ifdef _WIN32
-#  if !defined(NOMINMAX) && !defined(WIN32_LEAN_AND_MEAN)
+#  ifdef FMT_BIG_WIN
+#    include <windows.h>
+#  else
 #    define NOMINMAX
 #    define WIN32_LEAN_AND_MEAN
 #    include <windows.h>
 #    undef WIN32_LEAN_AND_MEAN
 #    undef NOMINMAX
-#  else
-#    include <windows.h>
 #  endif
 #  include <io.h>
 #endif