Index: acpica-unix2-20170629/source/include/platform/aclinux.h
===================================================================
--- acpica-unix2-20170629.orig/source/include/platform/aclinux.h
+++ acpica-unix2-20170629/source/include/platform/aclinux.h
@@ -224,9 +224,11 @@
 #define __cdecl
 #endif
 
+#if defined(__BIG_ENDIAN__)
 #if defined(__PPC64__) || defined(__s390x__)
 #define ACPI_BIG_ENDIAN
 #endif
+#endif
 
 #endif /* __KERNEL__ */