diff --git a/include/configs/coreboot.h b/include/configs/coreboot.h
index a010adc..50f6964 100644
--- a/include/configs/coreboot.h
+++ b/include/configs/coreboot.h
@@ -152,6 +152,7 @@
 #define CONFIG_CMD_FPGA
 #define CONFIG_CMD_IMI
 #undef CONFIG_CMD_IMLS
+#define CONFIG_CMD_IO
 #define CONFIG_CMD_IRQ
 #define CONFIG_CMD_ITEST
 #define CONFIG_CMD_LOADB