diff --git a/Doc/library/random.rst b/Doc/library/random.rst
index ff5fb77..f08192d 100644
--- a/Doc/library/random.rst
+++ b/Doc/library/random.rst
@@ -111,8 +111,8 @@
 
 .. function:: sample(population, k)
 
-   Return a *k* length list of unique elements chosen from the population sequence.
-   Used for random sampling without replacement.
+   Return a *k* length list of unique elements chosen from the population sequence
+   or set. Used for random sampling without replacement.
 
    Returns a new list containing elements from the population while leaving the
    original population unchanged.  The resulting list is in selection order so that