diff -r 407625051c45 Doc/library/math.rst
--- a/Doc/library/math.rst	Sun Feb 10 19:29:54 2013 +0200
+++ b/Doc/library/math.rst	Sun Feb 10 18:36:17 2013 +0000
@@ -215,6 +215,9 @@
    ``x`` is negative, and ``y`` is not an integer then ``pow(x, y)``
    is undefined, and raises :exc:`ValueError`.
 
+   Unlike the built-in ``**`` operator, :func:`math.pow` converts both
+   its arguments to type :class:`float`.  Use ``**`` or the built-in
+   :func:`pow` function for computing exact integer powers.
 
 .. function:: sqrt(x)