diff --git a/lazyllm/components/prompter/builtinPrompt.py b/lazyllm/components/prompter/builtinPrompt.py
index 455ba97a..12143753 100644
--- a/lazyllm/components/prompter/builtinPrompt.py
+++ b/lazyllm/components/prompter/builtinPrompt.py
@@ -105,7 +105,7 @@ def _generate_prompt_dict_impl(self, instruction, input, user, history, tools, l
             raise TypeError("input must be a string or a dict")
 
         if user:
-            history[-1]["content"].insert(0, user)
+            history[-1]["content"] = user + history[-1]['content']
 
         history.insert(0, {"role": "system",
                            "content": self._system + "\n" + instruction if instruction else self._system})