pthread_rwlock_init(&entity->lock_box_off, NULL);
if (!map_add(&entities, &entity->data.id, &entity->rc, &cmp_entity, &refcount_inc))
- fprintf(stderr, "[warning] failed to add entity %lu\n", entity->data.id);
+ fprintf(stderr, "[warning] failed to add entity %zu\n", entity->data.id);
refcount_drp(&entity->rc);
}