diff --git a/cpp/src/decisiontree/levelalgo/levelhelper_classifier.cuh b/cpp/src/decisiontree/levelalgo/levelhelper_classifier.cuh
index dadbda3c6f..3cd5b762d5 100644
--- a/cpp/src/decisiontree/levelalgo/levelhelper_classifier.cuh
+++ b/cpp/src/decisiontree/levelalgo/levelhelper_classifier.cuh
@@ -1,5 +1,5 @@
 /*
- * Copyright \(c\) 2019-2021, NVIDIA CORPORATION.
+ * Copyright (c) 2019-2021, NVIDIA CORPORATION.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/cpp/src/decisiontree/levelalgo/levelhelper_regressor.cuh b/cpp/src/decisiontree/levelalgo/levelhelper_regressor.cuh
index 051f4c2cbf..b0ee921bb4 100644
--- a/cpp/src/decisiontree/levelalgo/levelhelper_regressor.cuh
+++ b/cpp/src/decisiontree/levelalgo/levelhelper_regressor.cuh
@@ -1,5 +1,5 @@
 /*
- * Copyright \(c\) 2019-2021, NVIDIA CORPORATION.
+ * Copyright (c) 2019-2021, NVIDIA CORPORATION.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.