diff --git a/Doc/library/fractions.rst b/Doc/library/fractions.rst
index 392b6d40e861fb..8796056b4b8722 100644
--- a/Doc/library/fractions.rst
+++ b/Doc/library/fractions.rst
@@ -25,8 +25,8 @@ another rational number, or from a string.
 
    The first version requires that *numerator* and *denominator* are instances
    of :class:`numbers.Rational` and returns a new :class:`Fraction` instance
-   with value ``numerator/denominator``. If *denominator* is ``0``, it
-   raises a :exc:`ZeroDivisionError`.
+   with value equal to ``numerator/denominator`` where the denominator is positive.
+   If *denominator* is ``0``, it raises a :exc:`ZeroDivisionError`.
 
    The second version requires that *number* is an instance of
    :class:`numbers.Rational` or has the :meth:`!as_integer_ratio` method