diff --git a/builtin/providers/aws/data_source_aws_ecs_container_definition.go b/builtin/providers/aws/data_source_aws_ecs_container_definition.go
index 91750abe8..df72f80e6 100644
--- a/builtin/providers/aws/data_source_aws_ecs_container_definition.go
+++ b/builtin/providers/aws/data_source_aws_ecs_container_definition.go
@@ -41,6 +41,10 @@ func dataSourceAwsEcsContainerDefinition() *schema.Resource {
 				Type:     schema.TypeInt,
 				Computed: true,
 			},
+			"memoryReservation": &schema.Schema{
+				Type:     schema.TypeInt,
+				Computed: true,
+			},
 			"disable_networking": &schema.Schema{
 				Type:     schema.TypeBool,
 				Computed: true,
@@ -65,6 +69,7 @@ func dataSourceAwsEcsContainerDefinitionRead(d *schema.ResourceData, meta interf
 	desc, err := conn.DescribeTaskDefinition(&ecs.DescribeTaskDefinitionInput{
 		TaskDefinition: aws.String(d.Get("task_definition").(string)),
 	})
+
 	if err != nil {
 		return err
 	}
@@ -83,6 +88,7 @@ func dataSourceAwsEcsContainerDefinitionRead(d *schema.ResourceData, meta interf
 		}
 		d.Set("cpu", aws.Int64Value(def.Cpu))
 		d.Set("memory", aws.Int64Value(def.Memory))
+		d.Set("memoryReservation", aws.Int64Value(def.MemoryReservation))
 		d.Set("disable_networking", aws.BoolValue(def.DisableNetworking))
 		d.Set("docker_labels", aws.StringValueMap(def.DockerLabels))
 
diff --git a/builtin/providers/aws/data_source_aws_ecs_container_definition_test.go b/builtin/providers/aws/data_source_aws_ecs_container_definition_test.go
index 85f3d1fb7..271b5b835 100644
--- a/builtin/providers/aws/data_source_aws_ecs_container_definition_test.go
+++ b/builtin/providers/aws/data_source_aws_ecs_container_definition_test.go
@@ -17,6 +17,7 @@ func TestAccAWSEcsDataSource_ecsContainerDefinition(t *testing.T) {
 					resource.TestCheckResourceAttr("data.aws_ecs_container_definition.mongo", "image", "mongo:latest"),
 					resource.TestCheckResourceAttr("data.aws_ecs_container_definition.mongo", "image_digest", "latest"),
 					resource.TestCheckResourceAttr("data.aws_ecs_container_definition.mongo", "memory", "128"),
+					resource.TestCheckResourceAttr("data.aws_ecs_container_definition.mongo", "memoryReservation", "64"),
 					resource.TestCheckResourceAttr("data.aws_ecs_container_definition.mongo", "cpu", "128"),
 					resource.TestCheckResourceAttr("data.aws_ecs_container_definition.mongo", "environment.SECRET", "KEY"),
 				),
@@ -43,6 +44,7 @@ resource "aws_ecs_task_definition" "mongo" {
     "essential": true,
     "image": "mongo:latest",
     "memory": 128,
+    "memoryReservation": 64,
     "name": "mongodb"
   }
 ]