diff --git a/app/boards/arm/mikoto/mikoto_520_defconfig b/app/boards/arm/mikoto/mikoto_520_defconfig
index 35d8717c..925711c0 100644
--- a/app/boards/arm/mikoto/mikoto_520_defconfig
+++ b/app/boards/arm/mikoto/mikoto_520_defconfig
@@ -18,5 +18,3 @@ CONFIG_SETTINGS_NVS=y
 CONFIG_FLASH=y
 CONFIG_FLASH_PAGE_LAYOUT=y
 CONFIG_FLASH_MAP=y
-CONFIG_CLOCK_CONTROL_NRF=y
-CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y