diff --git a/tests/unit/endian.h b/tests/unit/endian.h
index 5bc8630..3e24763 100644
--- a/tests/unit/endian.h
+++ b/tests/unit/endian.h
@@ -29,47 +29,13 @@
 #ifndef BOOST_DETAIL_ENDIAN_HPP
 #define BOOST_DETAIL_ENDIAN_HPP
 
-// GNU libc offers the helpful header <endian.h> which defines
-// __BYTE_ORDER
-
-#if defined (__GLIBC__)
-# include <endian.h>
-# if (__BYTE_ORDER == __LITTLE_ENDIAN)
-#  define BOOST_LITTLE_ENDIAN
-# elif (__BYTE_ORDER == __BIG_ENDIAN)
-#  define BOOST_BIG_ENDIAN
-# elif (__BYTE_ORDER == __PDP_ENDIAN)
-#  define BOOST_PDP_ENDIAN
-# else
-#  error Unknown machine endianness detected.
-# endif
-# define BOOST_BYTE_ORDER __BYTE_ORDER
-#elif defined(_BIG_ENDIAN) && !defined(_LITTLE_ENDIAN)
-# define BOOST_BIG_ENDIAN
-# define BOOST_BYTE_ORDER 4321
-#elif defined(_LITTLE_ENDIAN) && !defined(_BIG_ENDIAN)
+#include <endian.h>
+#if (__BYTE_ORDER == __LITTLE_ENDIAN)
 # define BOOST_LITTLE_ENDIAN
-# define BOOST_BYTE_ORDER 1234
-#elif defined(__sparc) || defined(__sparc__) \
-   || defined(_POWER) || defined(__powerpc__) \
-   || defined(__ppc__) || defined(__hpux) || defined(__hppa) \
-   || defined(_MIPSEB) || defined(_POWER) \
-   || defined(__s390__)
+#elif (__BYTE_ORDER == __BIG_ENDIAN)
 # define BOOST_BIG_ENDIAN
-# define BOOST_BYTE_ORDER 4321
-#elif defined(__i386__) || defined(__alpha__) \
-   || defined(__ia64) || defined(__ia64__) \
-   || defined(_M_IX86) || defined(_M_IA64) \
-   || defined(_M_ALPHA) || defined(__amd64) \
-   || defined(__amd64__) || defined(_M_AMD64) \
-   || defined(__x86_64) || defined(__x86_64__) \
-   || defined(_M_X64) || defined(__bfin__)
-
-# define BOOST_LITTLE_ENDIAN
-# define BOOST_BYTE_ORDER 1234
-#else
-# error The file boost/detail/endian.hpp needs to be set up for your CPU type.
+#elif (__BYTE_ORDER == __PDP_ENDIAN)
+# define BOOST_PDP_ENDIAN
 #endif
 
-
 #endif