diff --git a/include/configs/rcar-gen3-common.h b/include/configs/rcar-gen3-common.h
index a16d26b..226069d 100644
--- a/include/configs/rcar-gen3-common.h
+++ b/include/configs/rcar-gen3-common.h
@@ -16,6 +16,7 @@
 
 /* boot option */
 #define CONFIG_SUPPORT_RAW_INITRD
+#define CONFIG_AUTO_COMPLETE
 
 #define CONFIG_CMDLINE_TAG
 #define CONFIG_SETUP_MEMORY_TAGS