diff --git a/docs/docsite/rst/playbooks_checkmode.rst b/docs/docsite/rst/playbooks_checkmode.rst
index 954da5249ef..03d96d75de8 100644
--- a/docs/docsite/rst/playbooks_checkmode.rst
+++ b/docs/docsite/rst/playbooks_checkmode.rst
@@ -86,9 +86,10 @@ Showing Differences with ``--diff``
 
 .. versionadded:: 1.1
 
-The ``--diff`` option to ansible-playbook works great with ``--check`` (detailed above) but can also be used by itself.  When this flag is supplied, if any templated files on the remote system are changed, and the ansible-playbook CLI will report back
-the textual changes made to the file (or, if used with ``--check``, the changes that would have been made).  Since the diff
-feature produces a large amount of output, it is best used when checking a single host at a time, like so::
+The ``--diff`` option to ansible-playbook works great with ``--check`` (detailed above) but can also be used by itself.
+When this flag is supplied and the modules supports this, Ansible will report back the changes made or, if used with ``--check``, the changes that would have been made.
+This is mostly used in modules that manipulate files (i.e. template) but other modules might also show 'before and after' information (i.e. user).
+Since the diff feature produces a large amount of output, it is best used when checking a single host at a time, like so::
 
     ansible-playbook foo.yml --check --diff --limit foo.example.com