diff --git a/ports/alif/machine_rtc.c b/ports/alif/machine_rtc.c
index 11821cf38d..e7e98d08f7 100644
--- a/ports/alif/machine_rtc.c
+++ b/ports/alif/machine_rtc.c
@@ -120,6 +120,10 @@ void machine_rtc_set_wakeup(uint32_t seconds) {
     MICROPY_END_ATOMIC_SECTION(atomic_state);
 }
 
+void machine_rtc_cancel_wakeup(void) {
+    lprtc_interrupt_disable(machine_rtc.rtc);
+}
+
 static mp_obj_t machine_rtc_datetime(mp_uint_t n_args, const mp_obj_t *args) {
     if (n_args == 1) {
         // Get datetime.
diff --git a/ports/alif/modmachine.h b/ports/alif/modmachine.h
index ed08f6c53c..3d59199d33 100644
--- a/ports/alif/modmachine.h
+++ b/ports/alif/modmachine.h
@@ -28,5 +28,6 @@
 
 void machine_rtc_init(void);
 void machine_rtc_set_wakeup(uint32_t seconds);
+void machine_rtc_cancel_wakeup(void);
 
 #endif // MICROPY_INCLUDED_ALIF_MODMACHINE_H