diff --git a/app/boards/arm/mikoto/Kconfig b/app/boards/arm/mikoto/Kconfig
index 616d63a5dd..b40fdcff51 100644
--- a/app/boards/arm/mikoto/Kconfig
+++ b/app/boards/arm/mikoto/Kconfig
@@ -7,7 +7,7 @@ config BOARD_ENABLE_DCDC
 config BOARD_ENABLE_DCDC_HV
     bool "High voltage DCDC converter"
     select SOC_DCDC_NRF52X_HV
-    default y
+    default n
     depends on (BOARD_MIKOTO)
 
 choice BOARD_MIKOTO_CHARGER_CURRENT
diff --git a/app/boards/arm/nice_nano/Kconfig b/app/boards/arm/nice_nano/Kconfig
index dbeb82cd12..18a0a12e14 100644
--- a/app/boards/arm/nice_nano/Kconfig
+++ b/app/boards/arm/nice_nano/Kconfig
@@ -9,5 +9,5 @@ config BOARD_ENABLE_DCDC
 config BOARD_ENABLE_DCDC_HV
     bool "High voltage DCDC converter"
     select SOC_DCDC_NRF52X_HV
-    default y
+    default n
     depends on (BOARD_NICE_NANO_V2)