diff --git a/langchain/vectorstores/clickhouse.py b/langchain/vectorstores/clickhouse.py
index ed179c8b..62c3a943 100644
--- a/langchain/vectorstores/clickhouse.py
+++ b/langchain/vectorstores/clickhouse.py
@@ -68,7 +68,7 @@ class ClickhouseSettings(BaseSettings):
 
     index_type: str = "annoy"
     # Annoy supports L2Distance and cosineDistance.
-    index_param: Optional[Union[List, Dict]] = [100, "'L2Distance'"]
+    index_param: Optional[Union[List, Dict]] = ["'L2Distance'", 100]
     index_query_params: Dict[str, str] = {}
 
     column_map: Dict[str, str] = {