diff --git a/minode/connection.py b/minode/connection.py
index c74af5d..fe57d1e 100644
--- a/minode/connection.py
+++ b/minode/connection.py
@@ -425,6 +425,8 @@ class Connection(threading.Thread):
             addr = message.Addr.from_message(m)
             logging.debug('%s:%s -> %s', self.host_print, self.port, addr)
             for a in addr.addresses:
+                if not a.host or a.port == 0:
+                    continue
                 shared.unchecked_node_pool.add((a.host, a.port))
 
         elif m.command == b'ping':