diff --git a/sound/usb/line6/driver.c b/sound/usb/line6/driver.c
index c998667e98ef..14e587e70655 100644
--- a/sound/usb/line6/driver.c
+++ b/sound/usb/line6/driver.c
@@ -30,7 +30,7 @@
 /*
 	This is Line 6's MIDI manufacturer ID.
 */
-const unsigned char line6_midi_id[] = {
+const unsigned char line6_midi_id[3] = {
 	0x00, 0x01, 0x0c
 };
 EXPORT_SYMBOL_GPL(line6_midi_id);