diff --git a/docs/sources/features/datasources/cloudwatch.md b/docs/sources/features/datasources/cloudwatch.md
index 8d758e32ec6..0cc6b06fc8e 100755
--- a/docs/sources/features/datasources/cloudwatch.md
+++ b/docs/sources/features/datasources/cloudwatch.md
@@ -62,6 +62,7 @@ Here is a minimal policy example:
       "Effect": "Allow",
       "Action": [
         "cloudwatch:DescribeAlarmsForMetric",
+        "cloudwatch:DescribeAlarmHistory",
         "cloudwatch:ListMetrics",
         "cloudwatch:GetMetricStatistics",
         "cloudwatch:GetMetricData"