diff --git a/lib/ansible/modules/cloud/amazon/ec2_group.py b/lib/ansible/modules/cloud/amazon/ec2_group.py
index b381218f49..cd30795864 100644
--- a/lib/ansible/modules/cloud/amazon/ec2_group.py
+++ b/lib/ansible/modules/cloud/amazon/ec2_group.py
@@ -42,7 +42,7 @@ options:
     required: false
   rules:
     description:
-      - List of firewall inbound rules to enforce in this group (see example). If none are supplied, a default all-out rule is assumed. If an empty list is supplied, no inbound rules will be enabled.
+      - List of firewall inbound rules to enforce in this group (see example). If none are supplied, a default all-out rule is assumed. If an empty list is supplied, no inbound rules will be enabled. Rules list may include its own name in `group_name`. This allows idempotent loopback additions (e.g. allow group to acccess itself).
     required: false
   rules_egress:
     description: