Index: uspace/drv/rootvirt/rootvirt.c
===================================================================
--- uspace/drv/rootvirt/rootvirt.c	(revision 0a5a9509a7d4cad54e1a7838593a26fb5891ed93)
+++ uspace/drv/rootvirt/rootvirt.c	(revision 94c19b8850e15cf253c7e79006f1fe44b2c4b815)
@@ -84,5 +84,5 @@
 
 	int rc = child_device_register_wrapper(parent, virt_dev->name,
-	    virt_dev->match_id, 10);
+	    virt_dev->match_id, 10, NULL);
 
 	if (rc == EOK) {