add updateURL
diff --git a/openstack/networking/v2/networks/urls.go b/openstack/networking/v2/networks/urls.go
index 33c2387..a9eecc5 100644
--- a/openstack/networking/v2/networks/urls.go
+++ b/openstack/networking/v2/networks/urls.go
@@ -22,6 +22,10 @@
 	return rootURL(c)
 }
 
+func updateURL(c *gophercloud.ServiceClient, id string) string {
+	return resourceURL(c, id)
+}
+
 func deleteURL(c *gophercloud.ServiceClient, id string) string {
 	return resourceURL(c, id)
 }