forgot to do this

utils/he_ipv6/tunnelbroker.py

@@ -168,7 +168,7 @@ class TunnelBroker(object):
                     ipr.close()
                     raise e
         ipr.close()
-        if self.tun.enable_radvd:
+        if self.tun.ra_provider:
             self.tun.radvd.conf.write()
             self.tun.radvd.svc.restart()
         return(None)