diff --git a/metagpt/roles/di/role_zero.py b/metagpt/roles/di/role_zero.py
index 3e79b6a2c..1fa128ee6 100644
--- a/metagpt/roles/di/role_zero.py
+++ b/metagpt/roles/di/role_zero.py
@@ -271,12 +271,12 @@ class RoleZero(Role):
         # routing
         memory = self.get_memories(k=4)  # FIXME: A magic number for two rounds of Q&A
         context = self.llm.format_msg(memory + [UserMessage(content=QUICK_THINK_PROMPT)])
-        intent_result = await self.llm.aask(context, system_msgs=self.format_quick_system_prompt())
+        intent_result = await self.llm.aask(context, system_msgs=[self.format_quick_system_prompt()])
 
         if "QUICK" in intent_result or "AMBIGUOUS" in intent_result:  # llm call with the original context
             async with ThoughtReporter(enable_llm_stream=True) as reporter:
                 await reporter.async_report({"type": "quick"})
-                answer = await self.llm.aask(self.llm.format_msg(memory), system_msgs=QUICK_RESPONSE_SYSTEM_PROMPT.format(role_info=self._get_prefix()))
+                answer = await self.llm.aask(self.llm.format_msg(memory), system_msgs=[QUICK_RESPONSE_SYSTEM_PROMPT.format(role_info=self._get_prefix())])
         elif "SEARCH" in intent_result:
             query = "\n".join(str(msg) for msg in memory)
             answer = await SearchEnhancedQA().run(query)