diff --git a/drivers/bios_emulator/besys.c b/drivers/bios_emulator/besys.c
index 84724b7..ad88a53 100644
--- a/drivers/bios_emulator/besys.c
+++ b/drivers/bios_emulator/besys.c
@@ -47,6 +47,8 @@
 *
 ****************************************************************************/
 
+#define __io
+#include <asm/io.h>
 #include <common.h>
 #include "biosemui.h"
 
diff --git a/drivers/bios_emulator/bios.c b/drivers/bios_emulator/bios.c
index 7cf4879..bcc192f 100644
--- a/drivers/bios_emulator/bios.c
+++ b/drivers/bios_emulator/bios.c
@@ -41,6 +41,8 @@
 *
 ****************************************************************************/
 
+#define __io
+#include <asm/io.h>
 #include <common.h>
 #include "biosemui.h"