diff --git a/LibC/stdint.h b/LibC/stdint.h
index 62c5986c8b..4d0dc2bdfc 100644
--- a/LibC/stdint.h
+++ b/LibC/stdint.h
@@ -45,9 +45,6 @@ typedef __INT_LEAST64_TYPE__ int_least64_t;
 
 typedef __PTRDIFF_TYPE__ uintptr_t;
 typedef __PTRDIFF_TYPE__ intptr_t;
-#define INTPTR_MAX PTRDIFF_MAX
-#define INTPTR_MIN PTRDIFF_MIN
-#define UINTPTR_MAX __UINTPTR_MAX__
 
 typedef __UINTMAX_TYPE__ uintmax_t;
 #define UINTMAX_MAX __UINTMAX_MAX__
@@ -70,6 +67,39 @@ typedef __INTMAX_TYPE__ intmax_t;
 #define UINT32_MAX (4294967295U)
 #define UINT64_MAX (18446744073709551615ULL)
 
+#define INTPTR_MAX INT32_MAX
+#define INTPTR_MIN INT32_MIN
+#define UINTPTR_MAX UINT32_MAX
+
+#define INT_FAST8_MIN INT8_MIN
+#define INT_FAST16_MIN INT16_MIN
+#define INT_FAST32_MIN INT32_MIN
+#define INT_FAST64_MIN INT64_MIN
+
+#define INT_FAST8_MAX INT8_MAX
+#define INT_FAST16_MAX INT16_MAX
+#define INT_FAST32_MAX INT32_MAX
+#define INT_FAST64_MAX INT64_MAX
+
+#define UINT_FAST8_MAX UINT8_MAX
+#define UINT_FAST16_MAX UINT16_MAX
+#define UINT_FAST32_MAX UINT32_MAX
+#define UINT_FAST64_MAX UINT64_MAX
+
+#define INT_LEAST8_MIN INT8_MIN
+#define INT_LEAST16_MIN INT16_MIN
+#define INT_LEAST32_MIN INT32_MIN
+#define INT_LEAST64_MIN INT64_MIN
+
+#define INT_LEAST8_MAX INT8_MAX
+#define INT_LEAST16_MAX INT16_MAX
+#define INT_LEAST32_MAX INT32_MAX
+#define INT_LEAST64_MAX INT64_MAX
+
+#define UINT_LEAST8_MAX UINT8_MAX
+#define UINT_LEAST16_MAX UINT16_MAX
+#define UINT_LEAST32_MAX UINT32_MAX
+#define UINT_LEAST64_MAX UINT64_MAX
 
 #define INT64_C(x)  x##LL
 #define UINT64_C(x) x##ULL