--- a/mercurial/pycompat.py	Sun Jun 26 07:59:02 2016 -0700
+++ b/mercurial/pycompat.py	Sat Jun 25 17:22:06 2016 -0700
@@ -106,6 +106,7 @@
         "pathname2url",
         "HTTPBasicAuthHandler",
         "HTTPDigestAuthHandler",
+        "HTTPPasswordMgrWithDefaultRealm",
         "ProxyHandler",
         "quote",
         "Request",