diff --git a/sound/usb/caiaq/device.c b/sound/usb/caiaq/device.c
index dfd820483849..3a71bab8a477 100644
--- a/sound/usb/caiaq/device.c
+++ b/sound/usb/caiaq/device.c
@@ -488,7 +488,7 @@ static int init_card(struct snd_usb_caiaqdev *cdev)
 		memset(id, 0, sizeof(id));
 
 		for (c = card->shortname, len = 0;
-			*c && len < sizeof(card->id); c++)
+			*c && len < sizeof(card->id) - 1; c++)
 			if (*c != ' ')
 				id[len++] = *c;