diff --git a/website/source/docs/providers/aws/r/cloudwatch_metric_alarm.html.markdown b/website/source/docs/providers/aws/r/cloudwatch_metric_alarm.html.markdown
index d75333596fb1..6c6cab23b7bd 100644
--- a/website/source/docs/providers/aws/r/cloudwatch_metric_alarm.html.markdown
+++ b/website/source/docs/providers/aws/r/cloudwatch_metric_alarm.html.markdown
@@ -45,6 +45,9 @@ resource "aws_cloudwatch_metric_alarm" "bat" {
     period = "120"
     statistic = "Average"
     threshold = "80"
+    dimensions {
+        AutoScalingGroupName = "${aws_autoscaling_group.bar.name}"
+    }
     alarm_description = "This metric monitor ec2 cpu utilization"
     alarm_actions = ["${aws_autoscaling_policy.bat.arn}"]
 }