diff --git a/specification/web/resource-manager/Microsoft.Web/stable/2018-02-01/WebApps.json b/specification/web/resource-manager/Microsoft.Web/stable/2018-02-01/WebApps.json
index 46d6fe94216d..f9b436eef1bc 100644
--- a/specification/web/resource-manager/Microsoft.Web/stable/2018-02-01/WebApps.json
+++ b/specification/web/resource-manager/Microsoft.Web/stable/2018-02-01/WebApps.json
@@ -20928,6 +20928,9 @@
             }
           },
           "x-ms-client-flatten": true
+        },
+        "identity": {
+          "$ref": "./CommonDefinitions.json#/definitions/ManagedServiceIdentity"
         }
       }
     },