diff --git a/python/sglang/srt/function_call/deepseekv31_detector.py b/python/sglang/srt/function_call/deepseekv31_detector.py
index f9891d96f..e430cb861 100644
--- a/python/sglang/srt/function_call/deepseekv31_detector.py
+++ b/python/sglang/srt/function_call/deepseekv31_detector.py
@@ -202,5 +202,5 @@ class DeepSeekV31Detector(BaseFormatDetector):
         return lambda name: StructureInfo(
             begin="<｜tool▁call▁begin｜>" + name + "<｜tool▁sep｜>",
             end="<｜tool▁call▁end｜>",
-            trigger="<｜tool▁call▁begin｜>" + name + "<｜tool▁sep｜>",
+            trigger="<｜tool▁call▁begin｜>",
         )