diff --git a/arm-resources/2014-04-01-preview/swagger/resources.json b/arm-resources/2014-04-01-preview/swagger/resources.json
index 86b57ea93363..664b8545439c 100644
--- a/arm-resources/2014-04-01-preview/swagger/resources.json
+++ b/arm-resources/2014-04-01-preview/swagger/resources.json
@@ -146,7 +146,8 @@
               "$ref": "#/definitions/DeploymentExtended"
             }
           }
-        }
+        },
+		"x-ms-long-running-operation": true
       },
       "get": {
         "tags": [