diff --git a/doc/usage/extensions/coverage.rst b/doc/usage/extensions/coverage.rst
index 46d31053c..8c8054d5f 100644
--- a/doc/usage/extensions/coverage.rst
+++ b/doc/usage/extensions/coverage.rst
@@ -51,4 +51,11 @@ should check:
 
    .. versionadded:: 1.1
 
-.. _Python regular expressions: https://docs.python.org/library/re
\ No newline at end of file
+.. conval:: coverage_show_missing_items 
+
+   Print objects that are missing to standard output also.
+   ``False`` by default.
+
+   .. versionadded:: 3.1
+
+.. _Python regular expressions: https://docs.python.org/library/re