diff --git a/lua/avante/llm.lua b/lua/avante/llm.lua
index 7917469..500a454 100644
--- a/lua/avante/llm.lua
+++ b/lua/avante/llm.lua
@@ -732,7 +732,7 @@ function M._stream(opts)
             return
           end
           local new_opts = vim.tbl_deep_extend("force", opts, {
-            history_messages = opts.get_history_messages(),
+            history_messages = opts.get_history_messages and opts.get_history_messages() or {},
           })
           if provider.get_rate_limit_sleep_time then
             local sleep_time = provider:get_rate_limit_sleep_time(resp_headers)