diff --git a/shared-bindings/pulseio/PulseIn.c b/shared-bindings/pulseio/PulseIn.c
index 1769f5c7a8..c0660c36ff 100644
--- a/shared-bindings/pulseio/PulseIn.c
+++ b/shared-bindings/pulseio/PulseIn.c
@@ -87,7 +87,7 @@ STATIC mp_obj_t pulseio_pulsein_make_new(const mp_obj_type_t *type, size_t n_arg
     mp_arg_parse_all_kw_array(n_args, n_kw, all_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
     const mcu_pin_obj_t *pin = validate_obj_is_free_pin(args[ARG_pin].u_obj);
 
-    pulseio_pulsein_obj_t *self = m_new_obj(pulseio_pulsein_obj_t);
+    pulseio_pulsein_obj_t *self = m_new_ll_obj(pulseio_pulsein_obj_t);
     self->base.type = &pulseio_pulsein_type;
 
     common_hal_pulseio_pulsein_construct(self, pin, args[ARG_maxlen].u_int,