--- a/mercurial/hgweb/wsgicgi.py	Sun Oct 06 19:25:18 2019 -0400
+++ b/mercurial/hgweb/wsgicgi.py	Mon Oct 07 00:04:04 2019 -0400
@@ -24,7 +24,7 @@
     procutil.setbinary(procutil.stdin)
     procutil.setbinary(procutil.stdout)
 
-    environ = dict(os.environ.iteritems())  # re-exports
+    environ = dict(pycompat.iteritems(os.environ))  # re-exports
     environ.setdefault(r'PATH_INFO', b'')
     if environ.get(r'SERVER_SOFTWARE', r'').startswith(r'Microsoft-IIS'):
         # IIS includes script_name in PATH_INFO