diff -r ebe28dba4a78 Doc/library/functions.rst
--- a/Doc/library/functions.rst	Mon Dec 09 13:19:23 2013 +0100
+++ b/Doc/library/functions.rst	Mon Dec 09 22:51:44 2013 +0800
@@ -1178,8 +1178,8 @@
 .. function:: round(number[, ndigits])
 
    Return the floating point value *number* rounded to *ndigits* digits after
-   the decimal point.  If *ndigits* is omitted, it defaults to zero. Delegates
-   to ``number.__round__(ndigits)``.
+   the decimal point.  If *ndigits* is omitted, it returns the nearest integer
+   to its input.  Delegates to ``number.__round__(ndigits)``.
 
    For the built-in types supporting :func:`round`, values are rounded to the
    closest multiple of 10 to the power minus *ndigits*; if two multiples are