diff --git a/drivers/bios_emulator/besys.c b/drivers/bios_emulator/besys.c
index 84724b712535b2310a0a1771051d9477f723cc5c..ad88a53f0c435683dd4bd521e1df26aab9c917d9 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 7cf48792eb7ea98f72264fad70e95cb4318080ec..bcc192fb2e3f1c7201c96d970b0daa00bd39fb21 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"