diff --git a/packages/@aws-cdk/aws-ecs/README.md b/packages/@aws-cdk/aws-ecs/README.md
index 01c170e6d7086..83479b96eb56c 100644
--- a/packages/@aws-cdk/aws-ecs/README.md
+++ b/packages/@aws-cdk/aws-ecs/README.md
@@ -111,14 +111,14 @@ For a `FargateTaskDefinition`, specify the task size (`memoryMiB` and `cpu`):
 
 ```ts
 const fargateTaskDefinition = new ecs.FargateTaskDefinition(this, 'TaskDef', {
-  memoryMiB: '512'
-  cpu: 256,
+  memoryMiB: '512',
+  cpu: '256'
 });
 ```
 To add containers to a Task Definition, call `addContainer()`:
 
 ```ts
-const container = fargateTaskDefinition.addContainer(this, {
+const container = fargateTaskDefinition.addContainer("WebContainer", {
   // Use an image from DockerHub
   image: ecs.ContainerImage.fromDockerHub("amazon/amazon-ecs-sample"),
   // ... other options here ...
@@ -132,7 +132,7 @@ const ec2TaskDefinition = new ecs.Ec2TaskDefinition(this, 'TaskDef', {
   networkMode: bridge
 });
 
-const container = ec2TaskDefinition.addContainer(this, {
+const container = ec2TaskDefinition.addContainer("WebContainer", {
   // Use an image from DockerHub
   image: ecs.ContainerImage.fromDockerHub("amazon/amazon-ecs-sample"),
   memoryLimitMiB: 1024
@@ -156,7 +156,7 @@ tasks you intend to run: EC2, Fargate, or both:
 
 ```ts
 const taskDefinition = new ecs.TaskDefinition(this, 'TaskDef', {
-  memoryMiB: '512'
+  memoryMiB: '512',
   cpu: 256,
   networkMode: 'awsvpc',
   compatibility: ecs.Compatibility.Ec2AndFargate,