diff --git a/proto/ospf/topology.c b/proto/ospf/topology.c
index 8119cfa..7558d4a 100644
--- a/proto/ospf/topology.c
+++ b/proto/ospf/topology.c
@@ -278,7 +278,7 @@ ospf_originate_lsa(struct ospf_proto *p, struct ospf_new_lsa *lsa)
   if (!SNODE_VALID(en))
     s_add_tail(&p->lsal, SNODE en);
 
-  if (en->lsa_body == NULL)
+  if (!en->nf || !en->lsa_body)
     en->nf = lsa->nf;
 
   if (en->nf != lsa->nf)