diff --git a/drivers/ub/Kconfig b/drivers/ub/Kconfig
index 404d2bc22413658c15ccbe7da7e8ccc91ac9796c..6e0cf0df8a940cfb44c3012781a42fdeb201a2ae 100644
--- a/drivers/ub/Kconfig
+++ b/drivers/ub/Kconfig
@@ -2,7 +2,10 @@
 
 menuconfig UB
 	tristate "Unified Bus (UB) support"
-	default m
+	depends on ARM64
+	default n
 	help
 	  Core support for Unified Bus (UB).
+	  Currently it only support arm64 structure.
+	  Default option is close.
 	  To compile UB core as module, choose M here.