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-rw-r--r--docs/random-numbers.rst3
1 files changed, 3 insertions, 0 deletions
diff --git a/docs/random-numbers.rst b/docs/random-numbers.rst
index 68a72cf7..5113afd2 100644
--- a/docs/random-numbers.rst
+++ b/docs/random-numbers.rst
@@ -18,4 +18,7 @@ can obtain them with:
>>> import os
>>> iv = os.urandom(16)
+This will use ``/dev/urandom`` on UNIX platforms, and ``CryptGenRandom`` on
+Windows.
+
.. _`always use your operating system's provided random number generator`: http://sockpuppet.org/blog/2014/02/25/safely-generate-random-numbers/