diff --git a/tests/unit/unicorn_test.h b/tests/unit/unicorn_test.h
index ac09843f..159a1cbd 100644
--- a/tests/unit/unicorn_test.h
+++ b/tests/unit/unicorn_test.h
@@ -41,7 +41,7 @@
  */
 #define OK(stat) uc_assert_err(UC_ERR_OK, stat)
 
-#ifdef BOOST_BIG_ENDIAN
+#ifdef HOST_WORDS_BIGENDIAN
 #define LEINT32(x) (bswap_32(x))
 #define LEINT64(x) (bswap_64(x))
 #define BEINT32(x) (x)