static void
setup_message_id_table (nsim_main_t * nsm, api_main_t * am)
{
-#define _(id,n,crc) vl_msg_api_add_msg_name_crc (am, #n #crc, id + nsm->msg_id_base);
+#define _(id,n,crc) vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id + nsm->msg_id_base);
foreach_vl_msg_name_crc_nsim;
#undef _
}