diff --git a/variants/MINIMA/variant.cpp b/variants/MINIMA/variant.cpp
index 02c48b595..794854bdf 100644
--- a/variants/MINIMA/variant.cpp
+++ b/variants/MINIMA/variant.cpp
@@ -79,6 +79,11 @@ void usb_post_initialization() {
   ((R_USB_FS0_Type*)R_USB_FS0_BASE)->USBMC_b.VDCEN = 1;
 }
 
+void enableSubclockInputPins() {
+  R_BSP_RegisterProtectDisable(BSP_REG_PROTECT_CGC);
+  R_SYSTEM->SOSCCR_b.SOSTP = 1;
+  R_BSP_RegisterProtectEnable(BSP_REG_PROTECT_CGC);
+}
 
 void initVariant() {
   // bootloader configures LED_BUILTIN as PWM output, deconfigure it to avoid spurious signals
diff --git a/variants/UNOWIFIR4/variant.cpp b/variants/UNOWIFIR4/variant.cpp
index dddc5415f..91542247d 100644
--- a/variants/UNOWIFIR4/variant.cpp
+++ b/variants/UNOWIFIR4/variant.cpp
@@ -108,6 +108,12 @@ void usb_post_initialization() {
   ((R_USB_FS0_Type*)R_USB_FS0_BASE)->USBMC_b.VDCEN = 1;
 }
 
+void enableSubclockInputPins() {
+  R_BSP_RegisterProtectDisable(BSP_REG_PROTECT_CGC);
+  R_SYSTEM->SOSCCR_b.SOSTP = 1;
+  R_BSP_RegisterProtectEnable(BSP_REG_PROTECT_CGC);
+}
+
 void initVariant() {
   __maybe_start_usb();
   // bootloader configures LED_BUILTIN as PWM output, deconfigure it to avoid spurious signals