diff --git a/src/llmtuner/extras/template.py b/src/llmtuner/extras/template.py
index 9e88768e..a17fde85 100644
--- a/src/llmtuner/extras/template.py
+++ b/src/llmtuner/extras/template.py
@@ -569,7 +569,7 @@ register_template(
     prompt=[
         "GPT4 User: {{query}}",
         {"token": "<|end_of_turn|>"},
-        "GPT4 Assistant: "
+        "GPT4 Assistant:"
     ],
     system="",
     sep=[