diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst
index a5dacc68dcb..69f5d64ca5c 100644
--- a/Doc/library/functions.rst
+++ b/Doc/library/functions.rst
@@ -123,6 +123,8 @@ available.  They are listed here in alphabetical order.
 
    Without an argument, an array of size 0 is created.
 
+   .. versionadded:: 2.6
+
 
 .. function:: callable(object)