diff --git a/ospfd/ospf_asbr.h b/ospfd/ospf_asbr.h
index bc41a14..0fc3302 100644
--- a/ospfd/ospf_asbr.h
+++ b/ospfd/ospf_asbr.h
@@ -44,7 +44,7 @@
   /* Nexthop address. */
   struct in_addr nexthop;
 
-  /* Additional Route tag. */
+  /* Additional Route tag: this is the wire type */
   u_int32_t tag;
 
   struct route_map_set_values route_map_set;