diff --git a/lib/ansible/modules/cloud/amazon/ec2_asg.py b/lib/ansible/modules/cloud/amazon/ec2_asg.py
index 9475da263bb..52987279dec 100644
--- a/lib/ansible/modules/cloud/amazon/ec2_asg.py
+++ b/lib/ansible/modules/cloud/amazon/ec2_asg.py
@@ -123,7 +123,7 @@ options:
     description:
       - Length of time in seconds after a new EC2 instance comes into service that Auto Scaling starts checking its health.
     required: false
-    default: 500 seconds
+    default: 300 seconds
     version_added: "1.7"
   health_check_type:
     description: