diff --git a/os/hal/platforms/STM32/RTCv2/rtc_lld.c b/os/hal/platforms/STM32/RTCv2/rtc_lld.c
index f6ad340fe..7a6848f57 100644
--- a/os/hal/platforms/STM32/RTCv2/rtc_lld.c
+++ b/os/hal/platforms/STM32/RTCv2/rtc_lld.c
@@ -238,7 +238,7 @@ void rtc_lld_get_alarm(RTCDriver *rtcp,
  * @api
  */
 #if RTC_HAS_PERIODIC_WAKEUPS
-void rtcSetPeriodicWakeup_v2(RTCDriver *rtcp, RTCWakeup *wakeupspec){
+void rtcSetPeriodicWakeup_v2(RTCDriver *rtcp, const RTCWakeup *wakeupspec){
   chDbgCheck((wakeupspec->wakeup != 0x30000),
               "rtc_lld_set_periodic_wakeup, forbidden combination");
 
diff --git a/os/hal/platforms/STM32/RTCv2/rtc_lld.h b/os/hal/platforms/STM32/RTCv2/rtc_lld.h
index 78be00c69..1c9b6e627 100644
--- a/os/hal/platforms/STM32/RTCv2/rtc_lld.h
+++ b/os/hal/platforms/STM32/RTCv2/rtc_lld.h
@@ -210,7 +210,7 @@ extern "C" {
                          rtcalarm_t alarm,
                          RTCAlarm *alarmspec);
 #if RTC_HAS_PERIODIC_WAKEUPS
-  void rtcSetPeriodicWakeup_v2(RTCDriver *rtcp, RTCWakeup *wakeupspec);
+  void rtcSetPeriodicWakeup_v2(RTCDriver *rtcp, const RTCWakeup *wakeupspec);
   void rtcGetPeriodicWakeup_v2(RTCDriver *rtcp, RTCWakeup *wakeupspec);
 #endif /* RTC_HAS_PERIODIC_WAKEUPS */
   uint32_t rtc_lld_get_time_fat(RTCDriver *rtcp);