diff --git a/headers/build/host/sunos/endian.h b/headers/build/host/sunos/endian.h
index d47d89c404..7676633959 100644
--- a/headers/build/host/sunos/endian.h
+++ b/headers/build/host/sunos/endian.h
@@ -15,6 +15,8 @@
 #define	BYTE_ORDER		__BIG_ENDIAN
 #else
 #error Unable to determine byte order!
-#endif
+#endif
+
+#define __BYTE_ORDER	BYTE_ORDER
 
 #endif	// _HAIKU_BUILD_COMPATIBILITY_SUNOS_ENDIAN