diff --git a/include/lib/libc/stdint.h b/include/lib/libc/stdint.h
index d44a973..80b3e96 100644
--- a/include/lib/libc/stdint.h
+++ b/include/lib/libc/stdint.h
@@ -4,13 +4,135 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 /*
- * Portions copyright (c) 2018, ARM Limited and Contributors.
+ * Portions copyright (c) 2018-2019, ARM Limited and Contributors.
  * All rights reserved.
  */
 
 #ifndef STDINT_H
 #define STDINT_H
 
-#include <stdint_.h>
+#include <limits.h>
+
+#define INT8_MAX  CHAR_MAX
+#define INT8_MIN  CHAR_MIN
+#define UINT8_MAX UCHAR_MAX
+
+#define INT16_MAX  SHRT_MAX
+#define INT16_MIN  SHRT_MIN
+#define UINT16_MAX USHRT_MAX
+
+#define INT32_MAX  INT_MAX
+#define INT32_MIN  INT_MIN
+#define UINT32_MAX UINT_MAX
+
+#define INT64_MAX  LLONG_MAX
+#define INT64_MIN  LLONG_MIN
+#define UINT64_MAX ULLONG_MAX
+
+#define INT_LEAST8_MIN  INT8_MIN
+#define INT_LEAST8_MAX  INT8_MAX
+#define UINT_LEAST8_MAX UINT8_MAX
+
+#define INT_LEAST16_MIN  INT16_MIN
+#define INT_LEAST16_MAX  INT16_MAX
+#define UINT_LEAST16_MAX UINT16_MAX
+
+#define INT_LEAST32_MIN  INT32_MIN
+#define INT_LEAST32_MAX  INT32_MAX
+#define UINT_LEAST32_MAX UINT32_MAX
+
+#define INT_LEAST64_MIN  INT64_MIN
+#define INT_LEAST64_MAX  INT64_MAX
+#define UINT_LEAST64_MAX UINT64_MAX
+
+#define INT_FAST8_MIN  INT32_MIN
+#define INT_FAST8_MAX  INT32_MAX
+#define UINT_FAST8_MAX UINT32_MAX
+
+#define INT_FAST16_MIN  INT32_MIN
+#define INT_FAST16_MAX  INT32_MAX
+#define UINT_FAST16_MAX UINT32_MAX
+
+#define INT_FAST32_MIN  INT32_MIN
+#define INT_FAST32_MAX  INT32_MAX
+#define UINT_FAST32_MAX UINT32_MAX
+
+#define INT_FAST64_MIN  INT64_MIN
+#define INT_FAST64_MAX  INT64_MAX
+#define UINT_FAST64_MAX UINT64_MAX
+
+#define INTPTR_MIN  LONG_MIN
+#define INTPTR_MAX  LONG_MAX
+#define UINTPTR_MAX ULONG_MAX
+
+#define INTMAX_MIN  LLONG_MIN
+#define INTMAX_MAX  LLONG_MAX
+#define UINTMAX_MAX ULLONG_MAX
+
+#define PTRDIFF_MIN LONG_MIN
+#define PTRDIFF_MAX LONG_MAX
+
+#define SIZE_MAX UINT64_MAX
+
+#define INT8_C(x)  x
+#define INT16_C(x) x
+#define INT32_C(x) x
+#define INT64_C(x) x ## LL
+
+#define UINT8_C(x)  x
+#define UINT16_C(x) x
+#define UINT32_C(x) x ## U
+#define UINT64_C(x) x ## ULL
+
+#define INTMAX_C(x)  x ## LL
+#define UINTMAX_C(x) x ## ULL
+
+typedef signed char int8_t;
+typedef short int16_t;
+typedef int int32_t;
+typedef long long int64_t;
+
+typedef unsigned char uint8_t;
+typedef unsigned short uint16_t;
+typedef unsigned int uint32_t;
+typedef unsigned long long uint64_t;
+
+typedef signed char int8_least_t;
+typedef short int16_least_t;
+typedef int int32_least_t;
+typedef long long int64_least_t;
+
+typedef unsigned char uint8_least_t;
+typedef unsigned short uint16_least_t;
+typedef unsigned int uint32_least_t;
+typedef unsigned long long uint64_least_t;
+
+typedef int int8_fast_t;
+typedef int int16_fast_t;
+typedef int int32_fast_t;
+typedef long long int64_fast_t;
+
+typedef unsigned int uint8_fast_t;
+typedef unsigned int uint16_fast_t;
+typedef unsigned int uint32_fast_t;
+typedef unsigned long long uint64_fast_t;
+
+typedef long intptr_t;
+typedef unsigned long uintptr_t;
+
+/*
+* Conceptually, these are supposed to be the largest integers representable in C,
+* but GCC and Clang define them as long long for compatibility.
+*/
+typedef long long intmax_t;
+typedef unsigned long long uintmax_t;
+
+typedef long register_t;
+typedef unsigned long u_register_t;
+
+#ifdef __aarch64__
+typedef __int128 int128_t;
+typedef unsigned __int128 uint128_t;
+#endif /* __aarch64__ */
 
 #endif /* STDINT_H */