diff --git a/openstack/db/v1/instances/urls.go b/openstack/db/v1/instances/urls.go
index d30e762..a50da96 100644
--- a/openstack/db/v1/instances/urls.go
+++ b/openstack/db/v1/instances/urls.go
@@ -9,3 +9,7 @@
 func resourceURL(c *gophercloud.ServiceClient, id string) string {
 	return c.ServiceURL("instances", id)
 }
+
+func userRootURL(c *gophercloud.ServiceClient, id string) string {
+	return c.ServiceURL("instances", id, "root")
+}