diff --git a/doc/JobTemplate/Setup/PrepareJob.rst b/doc/JobTemplate/Setup/PrepareJob.rst
index 4f1b48b..97adba3 100644
--- a/doc/JobTemplate/Setup/PrepareJob.rst
+++ b/doc/JobTemplate/Setup/PrepareJob.rst
@@ -363,7 +363,7 @@ ref_kind
 
 :Type:            string
 :Default Value:   ``'unknown'``
-:Possible Values: ``'branch'``, ``'tag'``, ``'unknown'``
+:Possible Values: ``'branch'``, ``'tag'``, ``'pullrequest'``, ``'unknown'``
 :Description:     Returns ``'branch'`` if pipeline's commit is on a branch or returns ``'tag'`` if the pipeline runs for
                   a tagged commit, otherwise returns ``'unknown'`` in case of an internal error.
 
@@ -371,6 +371,8 @@ ref_kind
                   result. |br|
                   If the kind is a tag, the tags name is available in the job's :ref:`JOBTMPL/PrepareJob/Output/tag`
                   result. |br|
+                  If the kind is a pull-request, the pull request's id is available in the job's :ref:`JOBTMPL/PrepareJob/Output/pr_number`
+                  result. |br|
                   Moreover, if the tag matches the :ref:`JOBTMPL/PrepareJob/Input/release_tag_pattern`, the extracted
                   version is available in the job's :ref:`JOBTMPL/PrepareJob/Output/version` result.