diff --git a/openstack/db/v1/instances/urls.go b/openstack/db/v1/instances/urls.go
index e049b6c..d30e762 100644
--- a/openstack/db/v1/instances/urls.go
+++ b/openstack/db/v1/instances/urls.go
@@ -5,3 +5,7 @@
 func baseURL(c *gophercloud.ServiceClient) string {
 	return c.ServiceURL("instances")
 }
+
+func resourceURL(c *gophercloud.ServiceClient, id string) string {
+	return c.ServiceURL("instances", id)
+}