diff -r e910ea39253f Lib/pickletools.py
--- a/Lib/pickletools.py	Sun Oct 11 23:03:47 2015 -0700
+++ b/Lib/pickletools.py	Mon Oct 12 10:36:42 2015 +0300
@@ -1898,7 +1898,7 @@ opcodes = [
       arg=None,
       stack_before=[pyunicode, pyunicode],
       stack_after=[anyobject],
-      proto=0,
+      proto=4,
       doc="""Push a global object (module.attr) on the stack.
       """),