diff --git a/chat2api.py b/chat2api.py
index 66da6dd..ff3d4bb 100644
--- a/chat2api.py
+++ b/chat2api.py
@@ -64,6 +64,7 @@ async def process(request_data, req_token):
     res = await chat_service.send_conversation()
     return chat_service, res
 
+
 @app.post(f"/{api_prefix}/v1/chat/completions" if api_prefix else "/v1/chat/completions")
 async def send_conversation(request: Request, req_token: str = Depends(oauth2_scheme)):
     try:
diff --git a/chatgpt/chatFormat.py b/chatgpt/chatFormat.py
index 1a54873..1f3c1ed 100644
--- a/chatgpt/chatFormat.py
+++ b/chatgpt/chatFormat.py
@@ -133,7 +133,7 @@ async def stream_response(service, response, model, max_tokens):
     system_fingerprint_list = model_system_fingerprint.get(model, None)
     system_fingerprint = random.choice(system_fingerprint_list) if system_fingerprint_list else None
     created_time = int(time.time())
-    completion_tokens = -1
+    completion_tokens = 0
     len_last_content = 0
     len_last_citation = 0
     last_message_id = None