diff --git a/specification/containerservice/resource-manager/Microsoft.ContainerService/stable/2021-03-01/managedClusters.json b/specification/containerservice/resource-manager/Microsoft.ContainerService/stable/2021-03-01/managedClusters.json
index 8179fc9de7dc..c2689bf7e864 100644
--- a/specification/containerservice/resource-manager/Microsoft.ContainerService/stable/2021-03-01/managedClusters.json
+++ b/specification/containerservice/resource-manager/Microsoft.ContainerService/stable/2021-03-01/managedClusters.json
@@ -3307,6 +3307,10 @@
           "type": "string",
           "description": "Namespace of the pod identity."
         },
+        "bindingSelector": {
+          "type": "string",
+          "description": "Binding selector to use for the AzureIdentityBinding resource."
+        },
         "identity": {
           "$ref": "#/definitions/UserAssignedIdentity",
           "description": "Information of the user assigned identity."