diff --git a/lib/vty.c b/lib/vty.c
index a39fe9f41b..f387e79104 100644
--- a/lib/vty.c
+++ b/lib/vty.c
@@ -3195,6 +3195,8 @@ vty_terminate (void)
       vty_reset ();
       vector_free (vtyvec);
       vector_free (Vvty_serv_thread);
+      vtyvec = NULL;
+      Vvty_serv_thread = NULL;
     }
 }