diff --git a/llava/conversation.py b/llava/conversation.py
index 92550d7..bd7500e 100644
--- a/llava/conversation.py
+++ b/llava/conversation.py
@@ -411,7 +411,7 @@ def dict(self):
     messages=(),
     offset=0,
     sep_style=SeparatorStyle.LLAMA_2,
-    sep="",
+    sep="<s>",
     sep2="</s>",
 )