1 files changed, 6 insertions, 0 deletions
diff --git a/nic3com.c b/nic3com.c
index d3dcce5..8064b57 100644
--- a/nic3com.c
+++ b/nic3com.c
@@ -18,6 +18,8 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  */
 
+#if defined(__i386__) || defined(__x86_64__)
+
 #include <stdlib.h>
 #include <string.h>
 #include <sys/types.h>
@@ -112,3 +114,7 @@ uint8_t nic3com_chip_readb(const chipaddr addr)
 	OUTL((uint32_t)addr, io_base_addr + BIOS_ROM_ADDR);
 	return INB(io_base_addr + BIOS_ROM_DATA);
 }
+
+#else
+#error PCI port I/O access is not supported on this architecture yet.
+#endif