Fix error in description of 'oct' (issue 5678).
diff --git a/Doc/library/future_builtins.rst b/Doc/library/future_builtins.rst
index 6a1fdab..7ee7110 100644
--- a/Doc/library/future_builtins.rst
+++ b/Doc/library/future_builtins.rst
@@ -54,7 +54,7 @@
 
    Works like the builtin :func:`oct`, but instead of :meth:`__oct__` it will
    use the :meth:`__index__` method on its argument to get an integer that is
-   then converted to hexadecimal.
+   then converted to octal.
 
 .. function:: zip(*iterables)