diff --git a/headers/posix/endian.h b/headers/posix/endian.h
index 02b5c329f8..ba93bb128a 100644
--- a/headers/posix/endian.h
+++ b/headers/posix/endian.h
@@ -7,9 +7,7 @@
 
 
 #include <config/HaikuConfig.h>
-#ifdef _BSD_SOURCE
-#include <support/ByteOrder.h>
-#endif
+
 
 /* Defines architecture dependent endian constants.
  * The constant reflects the byte order, "4" is the most
@@ -30,49 +28,4 @@
 #define __LITTLE_ENDIAN		LITTLE_ENDIAN
 #define __BYTE_ORDER		BYTE_ORDER
 
-#ifdef _BSD_SOURCE
-
-/*
- * General byte order swapping functions.
- */
-#define	bswap16(x)	__swap_int16(x)
-#define	bswap32(x)	__swap_int32(x)
-#define	bswap64(x)	__swap_int64(x)
-
-/*
- * Host to big endian, host to little endian, big endian to host, and little
- * endian to host byte order functions as detailed in byteorder(9).
- */
-#if BYTE_ORDER == LITTLE_ENDIAN
-#define	htobe16(x)	bswap16((x))
-#define	htobe32(x)	bswap32((x))
-#define	htobe64(x)	bswap64((x))
-#define	htole16(x)	((uint16_t)(x))
-#define	htole32(x)	((uint32_t)(x))
-#define	htole64(x)	((uint64_t)(x))
-
-#define	be16toh(x)	bswap16((x))
-#define	be32toh(x)	bswap32((x))
-#define	be64toh(x)	bswap64((x))
-#define	le16toh(x)	((uint16_t)(x))
-#define	le32toh(x)	((uint32_t)(x))
-#define	le64toh(x)	((uint64_t)(x))
-#else /* BYTE_ORDER != LITTLE_ENDIAN */
-#define	htobe16(x)	((uint16_t)(x))
-#define	htobe32(x)	((uint32_t)(x))
-#define	htobe64(x)	((uint64_t)(x))
-#define	htole16(x)	bswap16((x))
-#define	htole32(x)	bswap32((x))
-#define	htole64(x)	bswap64((x))
-
-#define	be16toh(x)	((uint16_t)(x))
-#define	be32toh(x)	((uint32_t)(x))
-#define	be64toh(x)	((uint64_t)(x))
-#define	le16toh(x)	bswap16((x))
-#define	le32toh(x)	bswap32((x))
-#define	le64toh(x)	bswap64((x))
-#endif /* BYTE_ORDER == LITTLE_ENDIAN */
-
-#endif /* _BSD_SOURCE */
-
 #endif	/* _ENDIAN_H_ */