diff --git a/oml/nodes.py b/oml/nodes.py
index bebfa4c..640908d 100644
--- a/oml/nodes.py
+++ b/oml/nodes.py
@@ -355,6 +355,7 @@ class Node(Thread):
             r = self._opener.open(url, timeout=self.TIMEOUT*2)
         except:
             logger.debug('download failed %s', url, exc_info=True)
+            self.online = False
             return False
         code = r.getcode()
         if code == 200: