diff --git a/arch/nt32/bits/alltypes.h.in b/arch/nt32/bits/alltypes.h.in
index d323a39..e9b3222 100644
--- a/arch/nt32/bits/alltypes.h.in
+++ b/arch/nt32/bits/alltypes.h.in
@@ -2,6 +2,9 @@
 #define _Int64 long long
 #define _Reg int
 
+#define __LONG_MAX     0x7fffffffL
+#define __LLONG_MAX    0x7fffffffffffffffLL
+
 #ifndef __BYTE_ORDER__
 #define __BYTE_ORDER__ 1234
 #endif
diff --git a/arch/nt32/bits/limits.h b/arch/nt32/bits/limits.h
index 497ecc1..edbbe29 100644
--- a/arch/nt32/bits/limits.h
+++ b/arch/nt32/bits/limits.h
@@ -1,8 +1,13 @@
 #define PAGE_SIZE	65536
 #define LONG_BIT	32
 
-#define LONG_MAX  0x7fffffffL
-#define LLONG_MAX  0x7fffffffffffffffLL
+#ifndef LONG_MAX
+#define LONG_MAX        __LONG_MAX
+#endif
+
+#ifndef LLONG_MAX
+#define LLONG_MAX       __LLONG_MAX
+#endif
 
 #define _MIDIPIX_ABI    20170101
 #define _MIDIPIX_XFI    20170101
diff --git a/arch/nt64/bits/alltypes.h.in b/arch/nt64/bits/alltypes.h.in
index 8f14895..841b5ae 100644
--- a/arch/nt64/bits/alltypes.h.in
+++ b/arch/nt64/bits/alltypes.h.in
@@ -2,6 +2,9 @@
 #define _Int64 long
 #define _Reg long
 
+#define __LONG_MAX     0x7fffffffffffffffL
+#define __LLONG_MAX    0x7fffffffffffffffLL
+
 #ifndef __BYTE_ORDER__
 #define __BYTE_ORDER__ 1234
 #endif
diff --git a/arch/nt64/bits/limits.h b/arch/nt64/bits/limits.h
index b17372b..43a769a 100644
--- a/arch/nt64/bits/limits.h
+++ b/arch/nt64/bits/limits.h
@@ -1,8 +1,13 @@
 #define PAGE_SIZE	65536
 #define LONG_BIT	64
 
-#define LONG_MAX  0x7fffffffffffffffL
-#define LLONG_MAX  0x7fffffffffffffffLL
+#ifndef LONG_MAX
+#define LONG_MAX        __LONG_MAX
+#endif
+
+#ifndef LLONG_MAX
+#define LLONG_MAX       __LLONG_MAX
+#endif
 
 #define _MIDIPIX_ABI    20170101
 #define _MIDIPIX_XFI    20170101