diff --git a/ports/nordic/common-hal/microcontroller/__init__.c b/ports/nordic/common-hal/microcontroller/__init__.c
index 86e7916d754a8..38a3b1ee60938 100644
--- a/ports/nordic/common-hal/microcontroller/__init__.c
+++ b/ports/nordic/common-hal/microcontroller/__init__.c
@@ -8,6 +8,10 @@
#include "py/obj.h"
#include "py/runtime.h"
+#if CIRCUITPY_ALARM
+#include "common-hal/alarm/__init__.h"
+#endif
+
#include "common-hal/microcontroller/Pin.h"
#include "common-hal/microcontroller/Processor.h"
@@ -78,6 +82,14 @@ void common_hal_mcu_on_next_reset(mcu_runmode_t runmode) {
void common_hal_mcu_reset(void) {
filesystem_flush();
+
+ // Clear any saved info about last deep sleep wakeup,
+ // to avoid confusing this software reset with a real deep sleep reset.
+ // See logic in common_hal_mcu_processor_get_reset_reason().
+ #if CIRCUITPY_ALARM
+ sleepmem_wakeup_event = SLEEPMEM_WAKEUP_BY_NONE;
+ #endif
+
reset_cpu();
}
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