diff --git a/backend/open_webui/routers/retrieval.py b/backend/open_webui/routers/retrieval.py
index d4591833c9..c02b48e487 100644
--- a/backend/open_webui/routers/retrieval.py
+++ b/backend/open_webui/routers/retrieval.py
@@ -1789,7 +1789,7 @@ def search_web(request: Request, engine: str, query: str) -> list[SearchResult]:
                 request.app.state.config.SERPLY_API_KEY,
                 query,
                 request.app.state.config.WEB_SEARCH_RESULT_COUNT,
-                request.app.state.config.WEB_SEARCH_DOMAIN_FILTER_LIST,
+                filter_list=request.app.state.config.WEB_SEARCH_DOMAIN_FILTER_LIST,
             )
         else:
             raise Exception("No SERPLY_API_KEY found in environment variables")