diff --git a/configs/config.nyan b/configs/config.nyan
index 00c964e913..bf8d76164c 100644
--- a/configs/config.nyan
+++ b/configs/config.nyan
@@ -8,3 +8,6 @@ CONFIG_CONSOLE_PRERAM_BUFFER_SIZE=0x1fe0
 CONFIG_VBOOT_VERIFY_FIRMWARE=y
 CONFIG_FLASHMAP_OFFSET=0x00100000
 CONFIG_ELOG=y
+CONFIG_DRIVERS_AS3722_RTC=y
+CONFIG_DRIVERS_AS3722_RTC_BUS=4
+CONFIG_DRIVERS_AS3722_RTC_ADDR=0x40
diff --git a/configs/config.nyan_big b/configs/config.nyan_big
index 72c17acc45..74e54d1c95 100644
--- a/configs/config.nyan_big
+++ b/configs/config.nyan_big
@@ -8,3 +8,6 @@ CONFIG_CONSOLE_PRERAM_BUFFER_SIZE=0x1fe0
 CONFIG_VBOOT_VERIFY_FIRMWARE=y
 CONFIG_FLASHMAP_OFFSET=0x00100000
 CONFIG_ELOG=y
+CONFIG_DRIVERS_AS3722_RTC=y
+CONFIG_DRIVERS_AS3722_RTC_BUS=4
+CONFIG_DRIVERS_AS3722_RTC_ADDR=0x40
diff --git a/configs/config.nyan_blaze b/configs/config.nyan_blaze
index 900ffac839..75fd26cad1 100644
--- a/configs/config.nyan_blaze
+++ b/configs/config.nyan_blaze
@@ -8,3 +8,6 @@ CONFIG_CONSOLE_PRERAM_BUFFER_SIZE=0x1fe0
 CONFIG_VBOOT_VERIFY_FIRMWARE=y
 CONFIG_FLASHMAP_OFFSET=0x00100000
 CONFIG_ELOG=y
+CONFIG_DRIVERS_AS3722_RTC=y
+CONFIG_DRIVERS_AS3722_RTC_BUS=4
+CONFIG_DRIVERS_AS3722_RTC_ADDR=0x40