diff --git a/components/drivers/usb/usbdevice/class/uaudioreg.h b/components/drivers/usb/usbdevice/class/uaudioreg.h
index 6ed8614c39..eea3c2f053 100644
--- a/components/drivers/usb/usbdevice/class/uaudioreg.h
+++ b/components/drivers/usb/usbdevice/class/uaudioreg.h
@@ -31,6 +31,7 @@
  */
 
 #include <rtdef.h>
+#include <stdint.h>
 
 typedef uint8_t  uByte;
 typedef uint16_t uWord;