diff --git a/aws/validators.go b/aws/validators.go
index 27d78008712c..e1c436ec3a6a 100644
--- a/aws/validators.go
+++ b/aws/validators.go
@@ -9,6 +9,7 @@ import (
 	"time"
 
 	"github.com/aws/aws-sdk-go/service/apigateway"
+	"github.com/aws/aws-sdk-go/service/applicationautoscaling"
 	"github.com/aws/aws-sdk-go/service/cognitoidentity"
 	"github.com/aws/aws-sdk-go/service/cognitoidentityprovider"
 	"github.com/aws/aws-sdk-go/service/s3"
@@ -1125,8 +1126,16 @@ func validateAppautoscalingCustomizedMetricSpecificationStatistic(v interface{},
 
 func validateAppautoscalingPredefinedMetricSpecification(v interface{}, k string) (ws []string, errors []error) {
 	validMetrics := []string{
-		"DynamoDBReadCapacityUtilization",
-		"DynamoDBWriteCapacityUtilization",
+		applicationautoscaling.MetricTypeAlbrequestCountPerTarget,
+		applicationautoscaling.MetricTypeDynamoDbreadCapacityUtilization,
+		applicationautoscaling.MetricTypeDynamoDbwriteCapacityUtilization,
+		applicationautoscaling.MetricTypeEc2spotFleetRequestAverageCpuutilization,
+		applicationautoscaling.MetricTypeEc2spotFleetRequestAverageNetworkIn,
+		applicationautoscaling.MetricTypeEc2spotFleetRequestAverageNetworkOut,
+		applicationautoscaling.MetricTypeEcsserviceAverageCpuutilization,
+		applicationautoscaling.MetricTypeEcsserviceAverageMemoryUtilization,
+		applicationautoscaling.MetricTypeRdsreaderAverageCpuutilization,
+		applicationautoscaling.MetricTypeRdsreaderAverageDatabaseConnections,
 	}
 	metric := v.(string)
 	for _, o := range validMetrics {
diff --git a/aws/validators_test.go b/aws/validators_test.go
index 17a89aa14140..8904a6248a73 100644
--- a/aws/validators_test.go
+++ b/aws/validators_test.go
@@ -2864,6 +2864,65 @@ func TestResourceAWSElastiCacheReplicationGroupAuthTokenValidation(t *testing.T)
 	}
 }
 
+func TestValidateAppautoscalingPredefinedMetricSpecification(t *testing.T) {
+	cases := []struct {
+		Value    string
+		ErrCount int
+	}{
+		{
+			Value:    "ALBRequestCountPerTarget",
+			ErrCount: 0,
+		},
+		{
+			Value:    "DynamoDBReadCapacityUtilization",
+			ErrCount: 0,
+		},
+		{
+			Value:    "DynamoDBWriteCapacityUtilization",
+			ErrCount: 0,
+		},
+		{
+			Value:    "EC2SpotFleetRequestAverageCPUUtilization",
+			ErrCount: 0,
+		},
+		{
+			Value:    "EC2SpotFleetRequestAverageNetworkIn",
+			ErrCount: 0,
+		},
+		{
+			Value:    "EC2SpotFleetRequestAverageNetworkOut",
+			ErrCount: 0,
+		},
+		{
+			Value:    "ECSServiceAverageCPUUtilization",
+			ErrCount: 0,
+		},
+		{
+			Value:    "ECSServiceAverageMemoryUtilization",
+			ErrCount: 0,
+		},
+		{
+			Value:    "RDSReaderAverageCPUUtilization",
+			ErrCount: 0,
+		},
+		{
+			Value:    "RDSReaderAverageDatabaseConnections",
+			ErrCount: 0,
+		},
+		{
+			Value:    "NotValid",
+			ErrCount: 1,
+		},
+	}
+	for _, tc := range cases {
+		_, errors := validateAppautoscalingPredefinedMetricSpecification(tc.Value, "predefined_metric_type")
+
+		if len(errors) != tc.ErrCount {
+			t.Fatalf("Expected %d errors, got %d: %s", tc.ErrCount, len(errors), errors)
+		}
+	}
+}
+
 func TestValidateCognitoUserPoolDomain(t *testing.T) {
 	validTypes := []string{
 		"valid-domain",