diff --git a/arch/nt32/bits/limits.h b/arch/nt32/bits/limits.h
index bbac211..90738ab 100644
--- a/arch/nt32/bits/limits.h
+++ b/arch/nt32/bits/limits.h
@@ -6,3 +6,6 @@
 
 #define LONG_MAX  0x7fffffffL
 #define LLONG_MAX  0x7fffffffffffffffLL
+
+#define _MIDIPIX_GDI    20170101
+#define _MIDIPIX_XFI    20170101
diff --git a/arch/nt64/bits/limits.h b/arch/nt64/bits/limits.h
index 4c707e1..f75e5e9 100644
--- a/arch/nt64/bits/limits.h
+++ b/arch/nt64/bits/limits.h
@@ -6,3 +6,6 @@
 
 #define LONG_MAX  0x7fffffffffffffffL
 #define LLONG_MAX  0x7fffffffffffffffLL
+
+#define _MIDIPIX_GDI    20170101
+#define _MIDIPIX_XFI    20170101