diff --git a/python/sglang/srt/function_call/qwen25_detector.py b/python/sglang/srt/function_call/qwen25_detector.py
index c43ea384f..1e2254bb8 100644
--- a/python/sglang/srt/function_call/qwen25_detector.py
+++ b/python/sglang/srt/function_call/qwen25_detector.py
@@ -106,8 +106,8 @@ class Qwen25Detector(BaseFormatDetector):
     def structure_info(self) -> _GetInfoFunc:
         # TODO: Update the begin and end tokens with '\n' if necessary
         return lambda name: StructureInfo(
-            begin='<tool_call>{"name":"' + name + '", "arguments":',
-            end="}</tool_call>",
+            begin='<tool_call>\n{"name":"' + name + '", "arguments":',
+            end="}\n</tool_call>",
             trigger="<tool_call>",
         )