diff --git a/headers/posix/inttypes.h b/headers/posix/inttypes.h
index af139de94e..05809495e4 100644
--- a/headers/posix/inttypes.h
+++ b/headers/posix/inttypes.h
@@ -1,8 +1,9 @@
+/*
+ * Copyright 2002-2008 Haiku inc. All rights reserved.
+ * Distributed under the terms of the MIT License
+ */
 #ifndef _INTTYPES_H_
 #define _INTTYPES_H_
-/* 
-** Distributed under the terms of the OpenBeOS License.
-*/
 
 
 #include <stdint.h>
@@ -13,6 +14,186 @@ typedef struct {
 	intmax_t	rem;	/* remainder */
 } imaxdiv_t;
 
+#if !defined(__cplusplus) || defined(__STDC_FORMAT_MACROS)
+/* fprintf() macros for signed integers */
+#	define PRId8			"d"
+#	define PRIdLEAST8		"d"
+#	define PRIdFAST8		"d"
+#	define PRIi8			"i"
+#	define PRIiLEAST8		"i"
+#	define PRIiFAST8		"i"
+
+#	define PRId16			"d"
+#	define PRIdLEAST16		"d"
+#	define PRIdFAST16		"d"
+#	define PRIi16			"i"
+#	define PRIiLEAST16		"i"
+#	define PRIiFAST16		"i"
+
+#	define PRId32			"d"
+#	define PRIdLEAST32		"d"
+#	define PRIdFAST32		"d"
+#	define PRIi32			"i"
+#	define PRIiLEAST32		"i"
+#	define PRIiFAST32		"i"
+
+#	define PRId64			"lld"
+#	define PRIdLEAST64		"lld"
+#	define PRIdFAST64		"lld"
+#	define PRIi64			"lli"
+#	define PRIiLEAST64		"lli"
+#	define PRIiFAST64		"lli"
+
+#	define PRIdMAX			"lld"
+#	define PRIdPTR			"d"
+#	define PRIiMAX			"lli"
+#	define PRIiPTR			"i"
+
+/* fprintf() macros for unsigned integers */
+#	define PRIu8			"u"
+#	define PRIuLEAST8		"u"
+#	define PRIuFAST8		"u"
+#	define PRIo8			"o"
+#	define PRIoLEAST8		"o"
+#	define PRIoFAST8		"o"
+#	define PRIx8			"x"
+#	define PRIxLEAST8		"x"
+#	define PRIxFAST8		"x"
+#	define PRIX8			"X"
+#	define PRIXLEAST8		"X"
+#	define PRIXFAST8		"X"
+
+#	define PRIu16			"u"
+#	define PRIuLEAST16		"u"
+#	define PRIuFAST16		"u"
+#	define PRIo16			"o"
+#	define PRIoLEAST16		"o"
+#	define PRIoFAST16		"o"
+#	define PRIx16			"x"
+#	define PRIxLEAST16		"x"
+#	define PRIxFAST16		"x"
+#	define PRIX16			"X"
+#	define PRIXLEAST16		"X"
+#	define PRIXFAST16		"X"
+
+#	define PRIu32			"u"
+#	define PRIuLEAST32		"u"
+#	define PRIuFAST32		"u"
+#	define PRIo32			"o"
+#	define PRIoLEAST32		"o"
+#	define PRIoFAST32		"o"
+#	define PRIx32			"x"
+#	define PRIxLEAST32		"x"
+#	define PRIxFAST32		"x"
+#	define PRIX32			"X"
+#	define PRIXLEAST32		"X"
+#	define PRIXFAST32		"X"
+
+#	define PRIu64			"llu"
+#	define PRIuLEAST64		"llu"
+#	define PRIuFAST64		"llu"
+#	define PRIo64			"llo"
+#	define PRIoLEAST64		"llo"
+#	define PRIoFAST64		"llo"
+#	define PRIx64			"llx"
+#	define PRIxLEAST64		"llx"
+#	define PRIxFAST64		"llx"
+#	define PRIX64			"llX"
+#	define PRIXLEAST64		"llX"
+#	define PRIXFAST64		"llX"
+
+#	define PRIuMAX			"llu"
+#	define PRIuPTR			"u"
+#	define PRIoMAX			"llo"
+#	define PRIoPTR			"o"
+#	define PRIxMAX			"llx"
+#	define PRIxPTR			"x"
+#	define PRIXMAX			"llX"
+#	define PRIXPTR			"X"
+
+/* fscanf() macros for signed integers */
+#	define SCNd8 			"hhd"
+#	define SCNdLEAST8 		"hhd"
+#	define SCNdFAST8 		"d"
+#	define SCNi8 			"hhi"
+#	define SCNiLEAST8 		"hhi"
+#	define SCNiFAST8 		"i"
+
+#	define SCNd16			"hd"
+#	define SCNdLEAST16		"hd"
+#	define SCNdFAST16		"d"
+#	define SCNi16 			"hi"
+#	define SCNiLEAST16		"hi"
+#	define SCNiFAST16		"i"
+
+#	define SCNd32 			"d"
+#	define SCNdLEAST32		"d"
+#	define SCNdFAST32		"d"
+#	define SCNi32 			"i"
+#	define SCNiLEAST32		"i"
+#	define SCNiFAST32		"i"
+
+#	define SCNd64			"lld"
+#	define SCNdLEAST64		"lld"
+#	define SCNdFAST64		"lld"
+#	define SCNi64 			"lli"
+#	define SCNiLEAST64		"lli"
+#	define SCNiFAST64 		"lli"
+
+#	define SCNdMAX			"lld"
+#	define SCNdPTR			"d"
+#	define SCNiMAX			"lli"
+#	define SCNiPTR			"i"
+
+/* fscanf() macros for unsigned integers */
+#	define SCNu8 			"hhu"
+#	define SCNuLEAST8 		"hhu"
+#	define SCNuFAST8 		"u"
+#	define SCNo8 			"hho"
+#	define SCNoLEAST8 		"hho"
+#	define SCNoFAST8 		"o"
+#	define SCNx8 			"hhx"
+#	define SCNxLEAST8 		"hhx"
+#	define SCNxFAST8 		"x"
+
+#	define SCNu16			"hu"
+#	define SCNuLEAST16		"hu"
+#	define SCNuFAST16		"u"
+#	define SCNo16			"ho"
+#	define SCNoLEAST16		"ho"
+#	define SCNoFAST16		"o"
+#	define SCNx16			"hx"
+#	define SCNxLEAST16		"hx"
+#	define SCNxFAST16		"x"
+
+#	define SCNu32 			"u"
+#	define SCNuLEAST32		"u"
+#	define SCNuFAST32		"u"
+#	define SCNo32 			"o"
+#	define SCNoLEAST32		"o"
+#	define SCNoFAST32		"o"
+#	define SCNx32 			"x"
+#	define SCNxLEAST32		"x"
+#	define SCNxFAST32		"x"
+
+#	define SCNu64			"llu"
+#	define SCNuLEAST64		"llu"
+#	define SCNuFAST64		"llu"
+#	define SCNo64			"llo"
+#	define SCNoLEAST64		"llo"
+#	define SCNoFAST64		"llo"
+#	define SCNx64			"llx"
+#	define SCNxLEAST64		"llx"
+#	define SCNxFAST64		"llx"
+
+#	define SCNuMAX			"llu"
+#	define SCNuPTR			"u"
+#	define SCNoMAX			"llo"
+#	define SCNoPTR			"o"
+#	define SCNxMAX			"llx"
+#	define SCNxPTR			"x"
+#endif /* !defined(__cplusplus) || defined(__STDC_FORMAT_MACROS) */
+
 
 #ifdef __cplusplus
 extern "C" {