diff --git a/lib/include/srsran/phy/ch_estimation/cedron_freq_estimator.h b/lib/include/srsran/phy/ch_estimation/cedron_freq_estimator.h
index 865b0555a..515418286 100644
--- a/lib/include/srsran/phy/ch_estimation/cedron_freq_estimator.h
+++ b/lib/include/srsran/phy/ch_estimation/cedron_freq_estimator.h
@@ -1,12 +1,21 @@
 /**
+ * Copyright 2013-2023 Software Radio Systems Limited
  *
- * \section COPYRIGHT
+ * This file is part of srsRAN.
  *
- * Copyright 2013-2023 Software Radio Systems Limited
+ * srsRAN is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * srsRAN is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
  *
- * By using this file, you agree to the terms and conditions set
- * forth in the LICENSE file which can be found at the top level of
- * the distribution.
+ * A copy of the GNU Affero General Public License can be found in
+ * the LICENSE file in the top-level directory of this distribution
+ * and at http://www.gnu.org/licenses/.
  *
  */
 
diff --git a/lib/src/phy/ch_estimation/cedron_freq_estimator.c b/lib/src/phy/ch_estimation/cedron_freq_estimator.c
index 92c26794a..bace92f7a 100644
--- a/lib/src/phy/ch_estimation/cedron_freq_estimator.c
+++ b/lib/src/phy/ch_estimation/cedron_freq_estimator.c
@@ -1,12 +1,21 @@
 /**
+ * Copyright 2013-2023 Software Radio Systems Limited
  *
- * \section COPYRIGHT
+ * This file is part of srsRAN.
  *
- * Copyright 2013-2023 Software Radio Systems Limited
+ * srsRAN is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * srsRAN is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
  *
- * By using this file, you agree to the terms and conditions set
- * forth in the LICENSE file which can be found at the top level of
- * the distribution.
+ * A copy of the GNU Affero General Public License can be found in
+ * the LICENSE file in the top-level directory of this distribution
+ * and at http://www.gnu.org/licenses/.
  *
  */
 
diff --git a/lib/src/phy/utils/test/freq_est_test.c b/lib/src/phy/utils/test/freq_est_test.c
index 331afbe21..43981f20f 100644
--- a/lib/src/phy/utils/test/freq_est_test.c
+++ b/lib/src/phy/utils/test/freq_est_test.c
@@ -1,12 +1,21 @@
 /**
+ * Copyright 2013-2023 Software Radio Systems Limited
  *
- * \section COPYRIGHT
+ * This file is part of srsRAN.
  *
- * Copyright 2013-2021 Software Radio Systems Limited
+ * srsRAN is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.
  *
- * By using this file, you agree to the terms and conditions set
- * forth in the LICENSE file which can be found at the top level of
- * the distribution.
+ * srsRAN is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * A copy of the GNU Affero General Public License can be found in
+ * the LICENSE file in the top-level directory of this distribution
+ * and at http://www.gnu.org/licenses/.
  *
  */