diff --git a/specification/containerinstance/resource-manager/Microsoft.ContainerInstance/stable/2021-03-01/containerInstance.json b/specification/containerinstance/resource-manager/Microsoft.ContainerInstance/stable/2021-03-01/containerInstance.json
index 929bcaefcaf4..2cbac9c49984 100644
--- a/specification/containerinstance/resource-manager/Microsoft.ContainerInstance/stable/2021-03-01/containerInstance.json
+++ b/specification/containerinstance/resource-manager/Microsoft.ContainerInstance/stable/2021-03-01/containerInstance.json
@@ -399,8 +399,8 @@
           }
         ],
         "responses": {
-          "204": {
-            "description": "NoContent"
+          "202": {
+            "description": "Started - the container group is starting."
           },
           "default": {
             "description": "Error response describing why the operation failed.",
diff --git a/specification/containerinstance/resource-manager/Microsoft.ContainerInstance/stable/2021-03-01/examples/ContainerGroupsStart.json b/specification/containerinstance/resource-manager/Microsoft.ContainerInstance/stable/2021-03-01/examples/ContainerGroupsStart.json
index 495848e19c8a..2a461b724f68 100644
--- a/specification/containerinstance/resource-manager/Microsoft.ContainerInstance/stable/2021-03-01/examples/ContainerGroupsStart.json
+++ b/specification/containerinstance/resource-manager/Microsoft.ContainerInstance/stable/2021-03-01/examples/ContainerGroupsStart.json
@@ -6,6 +6,6 @@
     "containerGroupName": "demo1"
   },
   "responses": {
-    "204": {}
+    "202": {}
   }
 }