diff --git a/lib/resource.c b/lib/resource.c
index ab8c800f..7e624321 100644
--- a/lib/resource.c
+++ b/lib/resource.c
@@ -340,6 +340,7 @@ mb_alloc(pool *p, unsigned size)
   struct mblock *b = xmalloc(sizeof(struct mblock) + size);
 
   b->r.class = &mb_class;
+  b->r.n = (node) {};
   add_tail(&p->inside, &b->r.n);
   b->size = size;
   return b->data;
diff --git a/nest/rt-table.c b/nest/rt-table.c
index a46eeb77..ae5a8444 100644
--- a/nest/rt-table.c
+++ b/nest/rt-table.c
@@ -2304,7 +2304,7 @@ rt_commit(struct config *new, struct config *old)
   WALK_LIST(r, new->tables)
     if (!r->table)
       {
-	rtable *t = mb_alloc(rt_table_pool, sizeof(struct rtable));
+	rtable *t = mb_allocz(rt_table_pool, sizeof(struct rtable));
 	DBG("\t%s: created\n", r->name);
 	rt_setup(rt_table_pool, t, r);
 	add_tail(&routing_tables, &t->n);