diff --git a/serverless-plugin/alarms-api-gateway.js b/serverless-plugin/alarms-api-gateway.js
index 18ac1502..69b29ecc 100644
--- a/serverless-plugin/alarms-api-gateway.js
+++ b/serverless-plugin/alarms-api-gateway.js
@@ -1,6 +1,6 @@
 'use strict'
 
-const { makeResourceName } = require('./util')
+const { makeResourceName, getStatisticName } = require('./util')
 
 /**
  * @param {object} apiGwAlarmConfig The fully resolved alarm configuration
@@ -99,7 +99,7 @@ module.exports = function ApiGatewayAlarms (apiGwAlarmConfig, context) {
       resourceName: makeResourceName('Api', apiName, 'Availability'),
       resource: createApiAlarm(
         `ApiAvailability_${apiName}`,
-        `API 5XXError ${config.Statistic} for ${apiName} breaches ${threshold}`,
+        `API 5XXError ${getStatisticName(config)} for ${apiName} breaches ${threshold}`,
         apiName,
         config.ComparisonOperator,
         threshold,
@@ -120,7 +120,7 @@ module.exports = function ApiGatewayAlarms (apiGwAlarmConfig, context) {
       resourceName: makeResourceName('Api', apiName, '4XXError'),
       resource: createApiAlarm(
         `Api4XXError_${apiName}`,
-        `API 4XXError ${config.Statistic} for ${apiName} breaches ${threshold}`,
+        `API 4XXError ${getStatisticName(config)} for ${apiName} breaches ${threshold}`,
         apiName,
         config.ComparisonOperator,
         threshold,
@@ -141,7 +141,7 @@ module.exports = function ApiGatewayAlarms (apiGwAlarmConfig, context) {
       resourceName: makeResourceName('Api', apiName, 'Latency'),
       resource: createApiAlarm(
         `ApiLatency_${apiName}`,
-        `API Latency ${config.Statistic} for ${apiName} breaches ${threshold}`,
+        `API Latency ${getStatisticName(config)} for ${apiName} breaches ${threshold}`,
         apiName,
         config.ComparisonOperator,
         threshold,
diff --git a/serverless-plugin/alarms-kinesis.js b/serverless-plugin/alarms-kinesis.js
index e41eedfd..ad4f39a7 100644
--- a/serverless-plugin/alarms-kinesis.js
+++ b/serverless-plugin/alarms-kinesis.js
@@ -1,6 +1,6 @@
 'use strict'
 
-const { makeResourceName } = require('./util')
+const { makeResourceName, getStatisticName } = require('./util')
 
 const kinesisAlarmTypes = {
   StreamIteratorAge: 'GetRecords.IteratorAgeMilliseconds',
@@ -64,7 +64,7 @@ module.exports = function KinesisAlarms (kinesisAlarmConfig, context) {
         ActionsEnabled: true,
         AlarmActions: context.alarmActions,
         AlarmName: `${type}_${streamName}`,
-        AlarmDescription: `Kinesis ${config.Statistic} ${metric} for ${streamName} breaches ${threshold} milliseconds`,
+        AlarmDescription: `Kinesis ${getStatisticName(config)} ${metric} for ${streamName} breaches ${threshold} milliseconds`,
         EvaluationPeriods: config.EvaluationPeriods,
         ComparisonOperator: config.ComparisonOperator,
         Threshold: config.Threshold,
diff --git a/serverless-plugin/tests/util.test.js b/serverless-plugin/tests/util.test.js
index e5b4e2c2..aa20e62a 100644
--- a/serverless-plugin/tests/util.test.js
+++ b/serverless-plugin/tests/util.test.js
@@ -5,7 +5,8 @@ const { test } = require('tap')
 const {
   filterObject,
   resolveEcsClusterNameAsCfn,
-  resolveEcsClusterNameForSub
+  resolveEcsClusterNameForSub,
+  getStatisticName
 } = require('../util')
 
 test('filterObject filters out', (t) => {
@@ -76,3 +77,10 @@ test('resolveEcsClusterNameForSub', (t) => {
   t.same(fromUnexpected, unexpected)
   t.end()
 })
+
+test('getStatisticName chooses Statistic then ExtendedStatistic property', (t) => {
+  t.equal(getStatisticName({ Statistic: 'Sum' }), 'Sum')
+  t.equal(getStatisticName({ ExtendedStatistic: 'p99' }), 'p99')
+  t.equal(getStatisticName({ Statistic: 'Average', ExtendedStatistic: 'p99' }), 'Average')
+  t.end()
+})
diff --git a/serverless-plugin/util.js b/serverless-plugin/util.js
index 7d35b63c..cb25d076 100644
--- a/serverless-plugin/util.js
+++ b/serverless-plugin/util.js
@@ -66,9 +66,19 @@ function resolveEcsClusterNameForSub (cluster) {
   return cluster
 }
 
+/*
+ * Determine the presentation name for an alarm statistic
+ *
+ * @param {*} alarmConfig Alarm configuration
+ */
+function getStatisticName (alarmConfig) {
+  return alarmConfig.Statistic || alarmConfig.ExtendedStatistic
+}
+
 module.exports = {
   filterObject,
   makeResourceName,
   resolveEcsClusterNameAsCfn,
-  resolveEcsClusterNameForSub
+  resolveEcsClusterNameForSub,
+  getStatisticName
 }