diff --git a/letta/schemas/message.py b/letta/schemas/message.py
index 98e3097b..4594bb1b 100644
--- a/letta/schemas/message.py
+++ b/letta/schemas/message.py
@@ -528,7 +528,7 @@ class Message(BaseMessage):
                         id=self.id,
                         date=self.created_at,
                         tool_call=tool_call_obj,
-                        tool_calls=tool_call_obj,
+                        tool_calls=[tool_call_obj],
                         name=self.name,
                         otid=otid,
                         sender_id=self.sender_id,