diff --git a/aws/data_source_aws_kms_alias.go b/aws/data_source_aws_kms_alias.go
index 5117504ea52..e9d786f9536 100644
--- a/aws/data_source_aws_kms_alias.go
+++ b/aws/data_source_aws_kms_alias.go
@@ -5,6 +5,7 @@ import (
 	"log"
 	"time"
 
+	"github.com/aws/aws-sdk-go/aws/arn"
 	"github.com/aws/aws-sdk-go/service/kms"
 	"github.com/hashicorp/errwrap"
 	"github.com/hashicorp/terraform/helper/schema"
@@ -23,6 +24,10 @@ func dataSourceAwsKmsAlias() *schema.Resource {
 				Type:     schema.TypeString,
 				Computed: true,
 			},
+			"target_key_arn": {
+				Type:     schema.TypeString,
+				Computed: true,
+			},
 			"target_key_id": {
 				Type:     schema.TypeString,
 				Computed: true,
@@ -58,6 +63,20 @@ func dataSourceAwsKmsAliasRead(d *schema.ResourceData, meta interface{}) error {
 
 	d.SetId(time.Now().UTC().String())
 	d.Set("arn", alias.AliasArn)
+
+	aliasARN, err := arn.Parse(*alias.AliasArn)
+	if err != nil {
+		return err
+	}
+	targetKeyARN := arn.ARN{
+		Partition: aliasARN.Partition,
+		Service:   aliasARN.Service,
+		Region:    aliasARN.Region,
+		AccountID: aliasARN.AccountID,
+		Resource:  fmt.Sprintf("key/%s", *alias.TargetKeyId),
+	}
+	d.Set("target_key_arn", targetKeyARN.String())
+
 	d.Set("target_key_id", alias.TargetKeyId)
 
 	return nil
diff --git a/aws/data_source_aws_kms_alias_test.go b/aws/data_source_aws_kms_alias_test.go
index c498d5168ca..ee735e20995 100644
--- a/aws/data_source_aws_kms_alias_test.go
+++ b/aws/data_source_aws_kms_alias_test.go
@@ -2,6 +2,7 @@ package aws
 
 import (
 	"fmt"
+	"strings"
 	"testing"
 
 	"github.com/hashicorp/terraform/helper/acctest"
@@ -47,6 +48,15 @@ func testAccDataSourceAwsKmsAliasCheck(name string) resource.TestCheckFunc {
 			)
 		}
 
+		expectedTargetKeyArnSuffix := fmt.Sprintf("key/%s", kmsKeyRs.Primary.Attributes["target_key_id"])
+		if !strings.HasSuffix(attr["target_key_arn"], expectedTargetKeyArnSuffix) {
+			return fmt.Errorf(
+				"target_key_arn is %s; want suffix %s",
+				attr["target_key_arn"],
+				expectedTargetKeyArnSuffix,
+			)
+		}
+
 		if attr["target_key_id"] != kmsKeyRs.Primary.Attributes["target_key_id"] {
 			return fmt.Errorf(
 				"target_key_id is %s; want %s",
diff --git a/website/docs/d/kms_alias.html.markdown b/website/docs/d/kms_alias.html.markdown
index 354685732b3..3c5558a282c 100644
--- a/website/docs/d/kms_alias.html.markdown
+++ b/website/docs/d/kms_alias.html.markdown
@@ -28,3 +28,4 @@ data "aws_kms_alias" "s3" {
 
 * `arn` - The Amazon Resource Name(ARN) of the key alias.
 * `target_key_id` - Key identifier pointed to by the alias.
+* `target_key_arn` - ARN pointed to by the alias.