diff --git a/src/pipecat/services/google/google.py b/src/pipecat/services/google/google.py
index 128eb43b6..7aa9b7b7b 100644
--- a/src/pipecat/services/google/google.py
+++ b/src/pipecat/services/google/google.py
@@ -622,7 +622,7 @@ class GoogleAssistantContextAggregator(OpenAIAssistantContextAggregator):
             if message.role == "user":
                 for part in message.parts:
                     if part.function_response and part.function_response.id == tool_call_id:
-                        part.function_response.response = result
+                        part.function_response.response = {"response": result}
 
     async def handle_user_image_frame(self, frame: UserImageRawFrame):
         await self._update_function_call_result(