diff --git a/sys/dev/usb/usbdi.h b/sys/dev/usb/usbdi.h
index b3b26cff757..cee2de0c4c1 100644
--- a/sys/dev/usb/usbdi.h
+++ b/sys/dev/usb/usbdi.h
@@ -88,6 +88,8 @@ typedef void (*usbd_callback)(usbd_xfer_handle, usbd_private_handle,
 /* in usb.h #define USBD_SHORT_XFER_OK	0x04*/	/* allow short reads */
 #define USBD_FORCE_SHORT_XFER	0x08	/* force last short packet on write */
 
+#define	USBD_BITS	"\20\1NO_COPY\2SYNCHRONOUS\4FORCE_SHORT_XFER"
+
 #define USBD_NO_TIMEOUT 0
 #define USBD_DEFAULT_TIMEOUT 5000 /* ms = 5 s */
 
diff --git a/sys/dev/usb/usbdivar.h b/sys/dev/usb/usbdivar.h
index 95d8e0eff1f..603d6910405 100644
--- a/sys/dev/usb/usbdivar.h
+++ b/sys/dev/usb/usbdivar.h
@@ -240,6 +240,8 @@ struct usbd_xfer {
 	struct callout		timeout_handle;
 };
 
+#define	URQ_BITS "\20\1REQUEST\5AUTO_DMABUF\6DEV_DMABUF"
+
 void usbd_init(void);
 void usbd_finish(void);