diff --git a/moto/s3/responses.py b/moto/s3/responses.py
index 6b0cdc2d5..fe37c6f88 100644
--- a/moto/s3/responses.py
+++ b/moto/s3/responses.py
@@ -187,7 +187,7 @@ def _key_response(request, full_url, headers):
             response = template.render(
                 bucket_name=bucket_name,
                 key_name=key_name,
-                multipart_id=multipart.id,
+                upload_id=multipart.id,
             )
             return 200, headers, response