diff --git a/Doc/library/collections.rst b/Doc/library/collections.rst
index aa17a55..3d04063 100644
--- a/Doc/library/collections.rst
+++ b/Doc/library/collections.rst
@@ -338,6 +338,12 @@
       Remove all elements from the deque leaving it with length 0.
 
 
+   .. method:: count(x)
+
+      Count the number of deque elements equal to *x*.
+
+      .. versionadded:: 3.2
+
    .. method:: extend(iterable)
 
       Extend the right side of the deque by appending elements from the iterable