diff --git a/tests/unit/endian.h b/tests/unit/endian.h
index 5bc86308..b455899e 100644
--- a/tests/unit/endian.h
+++ b/tests/unit/endian.h
@@ -54,6 +54,7 @@
    || defined(_POWER) || defined(__powerpc__) \
    || defined(__ppc__) || defined(__hpux) || defined(__hppa) \
    || defined(_MIPSEB) || defined(_POWER) \
+   || defined(__ARMEB__) || defined(__AARCH64EB__) \
    || defined(__s390__)
 # define BOOST_BIG_ENDIAN
 # define BOOST_BYTE_ORDER 4321
@@ -63,6 +64,7 @@
    || defined(_M_ALPHA) || defined(__amd64) \
    || defined(__amd64__) || defined(_M_AMD64) \
    || defined(__x86_64) || defined(__x86_64__) \
+   || defined(__ARMEL__) || defined(__AARCH64EL__) \
    || defined(_M_X64) || defined(__bfin__)
 
 # define BOOST_LITTLE_ENDIAN