diff --git a/sound/isa/opti9xx/miro.c b/sound/isa/opti9xx/miro.c
index 59242baed576..59792f2fada1 100644
--- a/sound/isa/opti9xx/miro.c
+++ b/sound/isa/opti9xx/miro.c
@@ -1344,10 +1344,10 @@ static int snd_miro_probe(struct snd_card *card)
 	}
 
 	strcpy(card->driver, "miro");
-	snprintf(card->longname, sizeof(card->longname),
-		 "%s: OPTi%s, %s at 0x%lx, irq %d, dma %d&%d",
-		 card->shortname, miro->name, codec->pcm->name,
-		 miro->wss_base + 4, miro->irq, miro->dma1, miro->dma2);
+	scnprintf(card->longname, sizeof(card->longname),
+		  "%s: OPTi%s, %s at 0x%lx, irq %d, dma %d&%d",
+		  card->shortname, miro->name, codec->pcm->name,
+		  miro->wss_base + 4, miro->irq, miro->dma1, miro->dma2);
 
 	if (mpu_port <= 0 || mpu_port == SNDRV_AUTO_PORT)
 		rmidi = NULL;
diff --git a/sound/isa/opti9xx/opti92x-ad1848.c b/sound/isa/opti9xx/opti92x-ad1848.c
index 4beeb32fe2a7..c33f67dd5133 100644
--- a/sound/isa/opti9xx/opti92x-ad1848.c
+++ b/sound/isa/opti9xx/opti92x-ad1848.c
@@ -859,15 +859,15 @@ static int snd_opti9xx_probe(struct snd_card *card)
 	strcpy(card->driver, chip->name);
 	sprintf(card->shortname, "OPTi %s", card->driver);
 #if defined(CS4231) || defined(OPTi93X)
-	snprintf(card->longname, sizeof(card->longname),
-		 "%s, %s at 0x%lx, irq %d, dma %d&%d",
-		 card->shortname, codec->pcm->name,
-		 chip->wss_base + 4, irq, dma1, xdma2);
+	scnprintf(card->longname, sizeof(card->longname),
+		  "%s, %s at 0x%lx, irq %d, dma %d&%d",
+		  card->shortname, codec->pcm->name,
+		  chip->wss_base + 4, irq, dma1, xdma2);
 #else
-	snprintf(card->longname, sizeof(card->longname),
-		 "%s, %s at 0x%lx, irq %d, dma %d",
-		 card->shortname, codec->pcm->name, chip->wss_base + 4, irq,
-		 dma1);
+	scnprintf(card->longname, sizeof(card->longname),
+		  "%s, %s at 0x%lx, irq %d, dma %d",
+		  card->shortname, codec->pcm->name, chip->wss_base + 4, irq,
+		  dma1);
 #endif	/* CS4231 || OPTi93X */
 
 	if (mpu_port <= 0 || mpu_port == SNDRV_AUTO_PORT)