diff --git a/ospf6d/ospf6_top.h b/ospf6d/ospf6_top.h
index 27eb18c..02eb915 100644
--- a/ospf6d/ospf6_top.h
+++ b/ospf6d/ospf6_top.h
@@ -76,6 +76,7 @@
 };
 
 #define OSPF6_DISABLED    0x01
+#define OSPF6_STUB_ROUTER 0x02
 
 /* global pointer for OSPF top data structure */
 extern struct ospf6 *ospf6;