diff --git a/isisd/isis_adjacency.c b/isisd/isis_adjacency.c
index a898f24..a4078d7 100644
--- a/isisd/isis_adjacency.c
+++ b/isisd/isis_adjacency.c
@@ -131,6 +131,8 @@
   if (adjdb)
     listnode_delete (adjdb, adj);
 
+  THREAD_OFF (adj->t_expire);
+
   if (adj->ipv4_addrs)
     list_delete (adj->ipv4_addrs);
 #ifdef HAVE_IPV6