diff --git a/sherpa-onnx/csrc/wave-writer.cc b/sherpa-onnx/csrc/wave-writer.cc
index 81ddc1fbf..f20af4b13 100644
--- a/sherpa-onnx/csrc/wave-writer.cc
+++ b/sherpa-onnx/csrc/wave-writer.cc
@@ -1,4 +1,4 @@
-// sherpa-onnx/csrc/wave-writer.h
+// sherpa-onnx/csrc/wave-writer.cc
 //
 // Copyright (c)  2023  Xiaomi Corporation