diff --git a/sound/usb/usbaudio.h b/sound/usb/usbaudio.h
index c1415f4..ad9eab2 100644
--- a/sound/usb/usbaudio.h
+++ b/sound/usb/usbaudio.h
@@ -153,21 +153,24 @@
 #define QUIRK_NO_INTERFACE		-2
 #define QUIRK_ANY_INTERFACE		-1
 
-/* quirk type */
-#define QUIRK_MIDI_FIXED_ENDPOINT	0
-#define QUIRK_MIDI_YAMAHA		1
-#define QUIRK_MIDI_MIDIMAN		2
-#define QUIRK_COMPOSITE			3
-#define QUIRK_AUDIO_FIXED_ENDPOINT	4
-#define QUIRK_AUDIO_STANDARD_INTERFACE	5
-#define QUIRK_MIDI_STANDARD_INTERFACE	6
-#define QUIRK_AUDIO_EDIROL_UA700_UA25	7
-#define QUIRK_AUDIO_EDIROL_UA1000	8
-#define QUIRK_IGNORE_INTERFACE		9
-#define QUIRK_MIDI_NOVATION		10
-#define QUIRK_MIDI_RAW			11
-#define QUIRK_MIDI_EMAGIC		12
-#define QUIRK_MIDI_MIDITECH		13
+enum quirk_type {
+	QUIRK_IGNORE_INTERFACE,
+	QUIRK_COMPOSITE,
+	QUIRK_MIDI_STANDARD_INTERFACE,
+	QUIRK_MIDI_FIXED_ENDPOINT,
+	QUIRK_MIDI_YAMAHA,
+	QUIRK_MIDI_MIDIMAN,
+	QUIRK_MIDI_NOVATION,
+	QUIRK_MIDI_RAW,
+	QUIRK_MIDI_EMAGIC,
+	QUIRK_MIDI_MIDITECH,
+	QUIRK_AUDIO_STANDARD_INTERFACE,
+	QUIRK_AUDIO_FIXED_ENDPOINT,
+	QUIRK_AUDIO_EDIROL_UA700_UA25,
+	QUIRK_AUDIO_EDIROL_UA1000,
+
+	QUIRK_TYPE_COUNT
+};
 
 typedef struct snd_usb_audio_quirk snd_usb_audio_quirk_t;
 typedef struct snd_usb_midi_endpoint_info snd_usb_midi_endpoint_info_t;
@@ -176,7 +179,7 @@
 	const char *vendor_name;
 	const char *product_name;
 	int16_t ifnum;
-	int16_t type;
+	uint16_t type;
 	const void *data;
 };