diff --git a/include/sound/core.h b/include/sound/core.h
index 3dea798..0e8ae10 100644
--- a/include/sound/core.h
+++ b/include/sound/core.h
@@ -313,6 +313,7 @@
 int snd_card_disconnect(struct snd_card *card);
 int snd_card_free(struct snd_card *card);
 int snd_card_free_when_closed(struct snd_card *card);
+void snd_card_set_id(struct snd_card *card, const char *id);
 int snd_card_register(struct snd_card *card);
 int snd_card_info_init(void);
 int snd_card_info_done(void);