diff --git a/refptr_types.h b/refptr_types.h
index c2648ad..811c6f8 100644
--- a/refptr_types.h
+++ b/refptr_types.h
@@ -21,6 +21,10 @@
 typedef scoped_refptr<const Ethernet> EthernetConstRefPtr;
 typedef scoped_refptr<Ethernet> EthernetRefPtr;
 
+class VPN;
+typedef scoped_refptr<const VPN> VPNConstRefPtr;
+typedef scoped_refptr<VPN> VPNRefPtr;
+
 class WiFi;
 typedef scoped_refptr<const WiFi> WiFiConstRefPtr;
 typedef scoped_refptr<WiFi> WiFiRefPtr;