diff --git a/llama_index/retrievers/fusion_retriever.py b/llama_index/retrievers/fusion_retriever.py
index 3ce5f4380d67c..c702c17e53567 100644
--- a/llama_index/retrievers/fusion_retriever.py
+++ b/llama_index/retrievers/fusion_retriever.py
@@ -1,3 +1,4 @@
+import asyncio
 from enum import Enum
 from typing import Dict, List, Optional, Tuple