diff --git a/elasticsearch/client/__init__.py b/elasticsearch/client/__init__.py
index 49cefbe2..f1399b64 100644
--- a/elasticsearch/client/__init__.py
+++ b/elasticsearch/client/__init__.py
@@ -1313,7 +1313,7 @@ class Elasticsearch(object):
         if scroll_id in SKIP_IN_PATH and body in SKIP_IN_PATH:
             raise ValueError("You need to supply scroll_id or body.")
         elif scroll_id and not body:
-            body = {"scroll_id": [scroll_id]}
+            body = {"scroll_id": scroll_id}
         elif scroll_id:
             params["scroll_id"] = scroll_id