diff --git a/liba/include/stdint.h b/liba/include/stdint.h
index c8aeba737..34f8c5f03 100644
--- a/liba/include/stdint.h
+++ b/liba/include/stdint.h
@@ -11,4 +11,18 @@ typedef signed short int16_t;
 typedef signed int int32_t;
 typedef signed long long int64_t;
 
+typedef uint8_t uint_fast8_t;
+typedef uint16_t uint_fast16_t;
+typedef uint32_t uint_fast32_t;
+typedef uint64_t uint_fast64_t;
+
+typedef int8_t int_fast8_t;
+typedef int16_t int_fast16_t;
+typedef int32_t int_fast32_t;
+typedef int64_t int_fast64_t;
+
+typedef uint8_t uint_least8_t;
+
+#define UINT64_C(c) c ## ULL
+
 #endif