diff --git a/python/sglang/srt/managers/scheduler_profiler_mixin.py b/python/sglang/srt/managers/scheduler_profiler_mixin.py
index 6b30b790f..7d08f12b3 100644
--- a/python/sglang/srt/managers/scheduler_profiler_mixin.py
+++ b/python/sglang/srt/managers/scheduler_profiler_mixin.py
@@ -196,7 +196,7 @@ class SchedulerProfilerMixin:
                     None
                     if not _is_npu
                     else torch_npu.profiler.tensorboard_trace_handler(
-                        self.torch_profiler_output_dir
+                        str(self.torch_profiler_output_dir)
                     )
                 ),
             )