diff --git a/hwaccess.h b/hwaccess.h
index a230fa1..2d17326 100644
--- a/hwaccess.h
+++ b/hwaccess.h
@@ -160,6 +160,7 @@
 #define le_to_cpu32 cpu_to_le32
 #define le_to_cpu64 cpu_to_le64
 
+#if NEED_PCI == 1
 #if defined (__i386__) || defined (__x86_64__)
 
 #define __FLASHROM_HAVE_OUTB__ 1
@@ -320,5 +321,6 @@
 #error Unknown architecture, please check if it supports PCI port IO.
 
 #endif
+#endif
 
 #endif /* !__HWACCESS_H__ */