diff --git a/include/stdint.h b/include/stdint.h
index 77ae1a076..329fde88b 100644
--- a/include/stdint.h
+++ b/include/stdint.h
@@ -107,14 +107,14 @@ typedef unsigned long	uintmax_t;
 #define INT16_MAX		32767
 #define INT32_MAX		2147483647
 #if _WORD_SIZE > 2 && __L64
-#define INT64_MAX		9223372036854775807
+#define INT64_MAX		9223372036854775807LL
 #endif
 
 #define UINT8_MAX		255
 #define UINT16_MAX		65535
-#define UINT32_MAX		4294967295
+#define UINT32_MAX		4294967295U
 #if _WORD_SIZE > 2 && __L64
-#define UINT64_MAX		18446744073709551615
+#define UINT64_MAX		18446744073709551615ULL
 #endif
 
 #define INT_LEAST8_MIN		INT8_MIN