diff --git a/src/nameservice/WFServiceGovernance.h b/src/nameservice/WFServiceGovernance.h
index 6118a731..aa03ddb6 100644
--- a/src/nameservice/WFServiceGovernance.h
+++ b/src/nameservice/WFServiceGovernance.h
@@ -124,8 +124,11 @@ public:
 	void enable_server(const std::string& address);
 	void disable_server(const std::string& address);
 	virtual void get_current_address(std::vector<std::string>& addr_list);
-	virtual void server_list_change(const EndpointAddress *address, int state)
-	{}
+	virtual void server_list_change(const EndpointAddress *address,
+									enum ServerChangeState state)
+	{
+	}
+
 	void set_mttr_second(unsigned int second) { this->mttr_second = second; }
 	static bool in_select_history(WFNSTracing *tracing, EndpointAddress *addr);