--- a/drivers/net/wireless/mwifiex/usb.c
+++ b/drivers/net/wireless/mwifiex/usb.c
@@ -19,6 +19,7 @@
 
 #include "main.h"
 #include "usb.h"
+#include <linux/usb/audio.h>
 
 #define USB_VERSION	"1.0"