diff --git a/specification/operationalinsights/resource-manager/Microsoft.OperationalInsights/stable/2020-10-01/Clusters.json b/specification/operationalinsights/resource-manager/Microsoft.OperationalInsights/stable/2020-10-01/Clusters.json
index 4a2f3489e280..78b82498e54f 100644
--- a/specification/operationalinsights/resource-manager/Microsoft.OperationalInsights/stable/2020-10-01/Clusters.json
+++ b/specification/operationalinsights/resource-manager/Microsoft.OperationalInsights/stable/2020-10-01/Clusters.json
@@ -366,17 +366,8 @@
           "description": "Sets whether the cluster will support availability zones. This can be set as true only in regions where Azure Data Explorer support Availability Zones. This Property can not be modified after cluster creation. Default value is 'true' if region supports Availability Zones."
         },
         "billingType": {
-          "type": "string",
-          "readOnly": false,
-          "description": "Configures whether billing will be only on the cluster or each workspace will be billed by its proportional use. This does not change the overall billing, only how it will be distributed. Default value is 'Cluster'",
-          "enum": [
-            "Cluster",
-            "Workspaces"
-          ],
-          "x-ms-enum": {
-            "name": "BillingType",
-            "modelAsString": true
-          }
+          "$ref": "#/definitions/billingType",
+          "description": "The cluster's billing type."
         },
         "keyVaultProperties": {
           "$ref": "#/definitions/keyVaultProperties",
@@ -411,6 +402,10 @@
         "keyVaultProperties": {
           "$ref": "#/definitions/keyVaultProperties",
           "description": "The associated key properties."
+        },
+        "billingType": {
+          "$ref": "#/definitions/billingType",
+          "description": "The cluster's billing type."
         }
       },
       "description": "Log Analytics cluster patch properties."
@@ -507,6 +502,19 @@
         }
       }
     },
+    "billingType": {
+      "type": "string",
+      "readOnly": false,
+      "description": "Configures whether billing will be only on the cluster or each workspace will be billed by its proportional use. This does not change the overall billing, only how it will be distributed. Default value is 'Cluster'",
+      "enum": [
+        "Cluster",
+        "Workspaces"
+      ],
+      "x-ms-enum": {
+        "name": "BillingType",
+        "modelAsString": true
+      }
+    },
     "ClusterSku": {
       "description": "The cluster sku definition.",
       "properties": {