diff -r 0452fc26ab0f roundup/anypy/http_.py
--- a/roundup/anypy/http_.py    Tue Oct 09 19:56:17 2018 -0400
+++ b/roundup/anypy/http_.py    Thu Oct 18 18:37:22 2018 +0200
@@ -1,6 +1,7 @@
 try:
     # Python 3+
     from http import client, server
+    server.DEFAULT_ERROR_MESSAGE
 except:
     # Python 2.5-2.7
     import httplib as client