diff --git a/misc/usb_add_change b/misc/usb_add_change
index fa9c15f..8f5276e 100755
--- a/misc/usb_add_change
+++ b/misc/usb_add_change
@@ -7,3 +7,5 @@ DESC="${NAME} ${ID_SERIAL}"
 XS_KEY="qubes-usb-devices/$NAME"
 
 xenstore-write "$XS_KEY/desc" "$DESC"
+
+/sbin/modprobe xen-usbback 2> /dev/null || /sbin/modprobe usbbk