1 files changed, 2 insertions, 0 deletions
diff --git a/lib/ns.h b/lib/ns.h
index 20e0a38e3b..1963b8a359 100644
--- a/lib/ns.h
+++ b/lib/ns.h
@@ -71,6 +71,8 @@ struct ns {
 RB_HEAD(ns_head, ns);
 RB_PROTOTYPE(ns_head, ns, entry, ns_compare)
 
+extern struct ns_head ns_tree;
+
 /*
  * API for managing NETNS. eg from zebra daemon
  * one want to manage the list of NETNS, etc...