diff --git a/sound/usb/stream.c b/sound/usb/stream.c
index 2f6d39c2ba7c8e40274f48cdd77d45c477e80325..7711184a0d0bf1976d013a979968fe4c4a3e259c 100644
--- a/sound/usb/stream.c
+++ b/sound/usb/stream.c
@@ -1106,7 +1106,7 @@ static int __snd_usb_parse_audio_interface(struct snd_usb_audio *chip,
 	 * Dallas DS4201 workaround: It presents 5 altsettings, but the last
 	 * one misses syncpipe, and does not produce any sound.
 	 */
-	if (chip->usb_id == USB_ID(0x04fa, 0x4201))
+	if (chip->usb_id == USB_ID(0x04fa, 0x4201) && num >= 4)
 		num = 4;
 
 	for (i = 0; i < num; i++) {