diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/reindex.json b/rest-api-spec/src/main/resources/rest-api-spec/api/reindex.json
index fc701c29d6021..50a1e1dc692ea 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/reindex.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/reindex.json
@@ -34,6 +34,10 @@
           "type": "number",
           "default": 1,
           "description": "The number of slices this task should be divided into. Defaults to 1 meaning the task isn't sliced into subtasks."
+        },
+        "scroll": {
+          "type" : "time",
+          "description" : "Specify how long a consistent view of the index should be maintained for scrolled search"
         }
       }
     },