diff --git a/shared-bindings/countio/Counter.c b/shared-bindings/countio/Counter.c
index 4f0e0a692f..fc60994f5c 100644
--- a/shared-bindings/countio/Counter.c
+++ b/shared-bindings/countio/Counter.c
@@ -57,7 +57,7 @@ STATIC mp_obj_t countio_counter_make_new(const mp_obj_type_t *type, size_t n_arg
     const countio_edge_t edge = validate_edge(args[ARG_edge].u_obj, MP_QSTR_edge);
     const digitalio_pull_t pull = validate_pull(args[ARG_pull].u_obj, MP_QSTR_pull);
     // Make long-lived because some implementations use a pointer to the object as interrupt-handler data.
-    countio_counter_obj_t *self = m_new_ll_obj(countio_counter_obj_t);
+    countio_counter_obj_t *self = m_new_ll_obj_with_finaliser(countio_counter_obj_t);
     self->base.type = &countio_counter_type;
 
     common_hal_countio_counter_construct(self, pin, edge, pull);
@@ -134,6 +134,7 @@ MP_DEFINE_CONST_FUN_OBJ_1(countio_counter_reset_obj, countio_counter_reset);
 STATIC const mp_rom_map_elem_t countio_counter_locals_dict_table[] = {
     // Methods
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&countio_counter_deinit_obj) },
+    { MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&countio_counter_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
     { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&countio_counter___exit___obj) },
     { MP_ROM_QSTR(MP_QSTR_count), MP_ROM_PTR(&countio_counter_count_obj) },
diff --git a/shared-bindings/pulseio/PulseIn.c b/shared-bindings/pulseio/PulseIn.c
index 81edc48bfd..3510f11289 100644
--- a/shared-bindings/pulseio/PulseIn.c
+++ b/shared-bindings/pulseio/PulseIn.c
@@ -89,7 +89,7 @@ STATIC mp_obj_t pulseio_pulsein_make_new(const mp_obj_type_t *type, size_t n_arg
     const mcu_pin_obj_t *pin = validate_obj_is_free_pin(args[ARG_pin].u_obj, MP_QSTR_pin);
 
     // Make object long-lived to avoid moving between imports
-    pulseio_pulsein_obj_t *self = m_new_ll_obj(pulseio_pulsein_obj_t);
+    pulseio_pulsein_obj_t *self = m_new_ll_obj_with_finaliser(pulseio_pulsein_obj_t);
     self->base.type = &pulseio_pulsein_type;
 
     common_hal_pulseio_pulsein_construct(self, pin, args[ARG_maxlen].u_int,
@@ -277,6 +277,7 @@ STATIC mp_obj_t pulsein_subscr(mp_obj_t self_in, mp_obj_t index_obj, mp_obj_t va
 STATIC const mp_rom_map_elem_t pulseio_pulsein_locals_dict_table[] = {
     // Methods
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&pulseio_pulsein_deinit_obj) },
+    { MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&pulseio_pulsein_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
     { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&pulseio_pulsein___exit___obj) },
     { MP_ROM_QSTR(MP_QSTR_pause), MP_ROM_PTR(&pulseio_pulsein_pause_obj) },