diff --git a/lib/ansible/modules/files/blockinfile.py b/lib/ansible/modules/files/blockinfile.py
index 16b2b741e4..4022a8df49 100644
--- a/lib/ansible/modules/files/blockinfile.py
+++ b/lib/ansible/modules/files/blockinfile.py
@@ -95,6 +95,7 @@ notes:
   - When using 'with_*' loops be aware that if you do not set a unique mark the block will be overwritten on each iteration.
   - As of Ansible 2.3, the I(dest) option has been changed to I(path) as default, but I(dest) still works as well.
   - Option I(follow) has been removed in version 2.5, because this module modifies the contents of the file so I(follow=no) doesn't make sense.
+  - When more then one block should be handled in **one** file you **must** change the I(marker) per task
 """
 
 EXAMPLES = r"""