diff --git a/src/rp2_common/hardware_rtc/include/hardware/rtc.h b/src/rp2_common/hardware_rtc/include/hardware/rtc.h
index 65028db..c054af7 100644
--- a/src/rp2_common/hardware_rtc/include/hardware/rtc.h
+++ b/src/rp2_common/hardware_rtc/include/hardware/rtc.h
@@ -69,6 +69,11 @@ bool rtc_running(void);
  */
 void rtc_set_alarm(datetime_t *t, rtc_callback_t user_callback);
 
+/*! \brief Enable the RTC alarm (if inactive)
+ *  \ingroup hardware_rtc
+ */
+void rtc_enable_alarm(void);
+
 /*! \brief Disable the RTC alarm (if active)
  *  \ingroup hardware_rtc
  */
diff --git a/src/rp2_common/hardware_rtc/rtc.c b/src/rp2_common/hardware_rtc/rtc.c
index 5337d33..813b5f1 100644
--- a/src/rp2_common/hardware_rtc/rtc.c
+++ b/src/rp2_common/hardware_rtc/rtc.c
@@ -103,7 +103,7 @@ bool rtc_get_datetime(datetime_t *t) {
     return true;
 }
 
-static void rtc_enable_alarm(void) {
+void rtc_enable_alarm(void) {
     // Set matching and wait for it to be enabled
     hw_set_bits(&rtc_hw->irq_setup_0, RTC_IRQ_SETUP_0_MATCH_ENA_BITS);
     while(!(rtc_hw->irq_setup_0 & RTC_IRQ_SETUP_0_MATCH_ACTIVE_BITS)) {