diff --git a/python/raft-ann-bench/src/raft-ann-bench/run/__main__.py b/python/raft-ann-bench/src/raft-ann-bench/run/__main__.py
index 52d536c2e8..c34377d733 100644
--- a/python/raft-ann-bench/src/raft-ann-bench/run/__main__.py
+++ b/python/raft-ann-bench/src/raft-ann-bench/run/__main__.py
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2023, NVIDIA CORPORATION.
+# Copyright (c) 2023-2024, NVIDIA CORPORATION.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -553,10 +553,14 @@ def add_algo_group(group_list):
                             index["build_param"], conf_file["dataset"]["dims"]
                         ):
                             continue
-
+                index_filename = (
+                    index_name
+                    if len(index_name) < 128
+                    else str(hash(index_name))
+                )
                 index["name"] = index_name
                 index["file"] = os.path.join(
-                    args.dataset_path, args.dataset, "index", index_name
+                    args.dataset_path, args.dataset, "index", index_filename
                 )
                 index["search_params"] = []
                 all_search_params = itertools.product(*search_param_lists)