diff --git a/usb-stub.c b/usb-stub.c
index 9c3fceab1fc2eb3dfee1130a28ba0f8a575ab919..b4e10c12ca60446aec0ecc8362ab48ebaefea60e 100644
--- a/usb-stub.c
+++ b/usb-stub.c
@@ -41,7 +41,7 @@ void usb_host_info(Monitor *mon)
 }
 
 /* XXX: modify configure to compile the right host driver */
-USBDevice *usb_host_device_open(const char *devname)
+USBDevice *usb_host_device_open(USBBus *bus, const char *devname)
 {
     return NULL;
 }