diff --git a/repos/libports/src/lib/qemu-usb/host.cc b/repos/libports/src/lib/qemu-usb/host.cc
index 631148d9fd..49e047a83e 100644
--- a/repos/libports/src/lib/qemu-usb/host.cc
+++ b/repos/libports/src/lib/qemu-usb/host.cc
@@ -1040,6 +1040,7 @@ struct Usb_devices : List<Usb_host_device>
 	: _ep(ep), _env(env), _alloc(alloc)
 	{
 		_devices_rom.sigh(_device_dispatcher);
+		_devices_update();
 	}
 
 	void destroy()