diff --git a/docs/docsite/rst/user_guide/playbooks_conditionals.rst b/docs/docsite/rst/user_guide/playbooks_conditionals.rst
index d07d942de49..077d676bf18 100644
--- a/docs/docsite/rst/user_guide/playbooks_conditionals.rst
+++ b/docs/docsite/rst/user_guide/playbooks_conditionals.rst
@@ -69,6 +69,7 @@ decide to do something conditionally based on success or failure::
 
 
 .. note:: both `success` and `succeeded` work (`fail`/`failed`, etc).
+.. warning:: You might expect a variable of a skipped task to be undefined and use `defined` or `default` to check that. **This is incorrect**! Even when a task is failed or skipped the variable is still registered with a failed or skipped status. See :ref:`registered_variables`.
 
 
 To see what facts are available on a particular system, you can do the following in a playbook::