diff --git a/rag/llm/cv_model.py b/rag/llm/cv_model.py
index 30080854fc..df22c41083 100644
--- a/rag/llm/cv_model.py
+++ b/rag/llm/cv_model.py
@@ -728,7 +728,7 @@ class OpenRouterCV(GptV4):
 class LocalAICV(GptV4):
     _FACTORY_NAME = "LocalAI"
 
-    def __init__(self, key, model_name, base_url, lang="Chinese", **kwargs):
+    def __init__(self, key, model_name, lang="Chinese", base_url="", **kwargs):
         if not base_url:
             raise ValueError("Local cv model url cannot be None")
         base_url = ensure_v1(base_url)