diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5d3180a5..1c97c664 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,3 +1,15 @@
+#
+# telekom / sysrepo-plugin-system
+#
+# This program is made available under the terms of the
+# BSD 3-Clause license which is available at
+# https://opensource.org/licenses/BSD-3-Clause
+#
+# SPDX-FileCopyrightText: 2022 Deutsche Telekom AG
+# SPDX-FileContributor: Sartura Ltd.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
 cmake_minimum_required(VERSION 3.0)
 project(sysrepo-interfaces-plugins C)
 
diff --git a/CompileOptions.cmake b/CompileOptions.cmake
index fbe23896..53f1c42b 100644
--- a/CompileOptions.cmake
+++ b/CompileOptions.cmake
@@ -1,3 +1,15 @@
+#
+# telekom / sysrepo-plugin-system
+#
+# This program is made available under the terms of the
+# BSD 3-Clause license which is available at
+# https://opensource.org/licenses/BSD-3-Clause
+#
+# SPDX-FileCopyrightText: 2022 Deutsche Telekom AG
+# SPDX-FileContributor: Sartura Ltd.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=c11")
diff --git a/LogOptions.cmake b/LogOptions.cmake
index da761851..84e1cf16 100644
--- a/LogOptions.cmake
+++ b/LogOptions.cmake
@@ -1,3 +1,15 @@
+#
+# telekom / sysrepo-plugin-system
+#
+# This program is made available under the terms of the
+# BSD 3-Clause license which is available at
+# https://opensource.org/licenses/BSD-3-Clause
+#
+# SPDX-FileCopyrightText: 2022 Deutsche Telekom AG
+# SPDX-FileContributor: Sartura Ltd.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
 option(ENABLE_LOG_LOG "Enable log messages" ON)
 option(ENABLE_LOG_WARNING "Enable warning messages" ON)
 option(ENABLE_LOG_ERROR "Enable error messages" ON)
diff --git a/src/interfaces/CMakeLists.txt b/src/interfaces/CMakeLists.txt
index 8ac11d4c..0f7866a4 100644
--- a/src/interfaces/CMakeLists.txt
+++ b/src/interfaces/CMakeLists.txt
@@ -1,3 +1,15 @@
+#
+# telekom / sysrepo-plugin-system
+#
+# This program is made available under the terms of the
+# BSD 3-Clause license which is available at
+# https://opensource.org/licenses/BSD-3-Clause
+#
+# SPDX-FileCopyrightText: 2022 Deutsche Telekom AG
+# SPDX-FileContributor: Sartura Ltd.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
 cmake_minimum_required(VERSION 3.0)
 project(sysrepo-plugin-interfaces C)
 
diff --git a/src/interfaces/tests/CMakeLists.txt b/src/interfaces/tests/CMakeLists.txt
index 1fbb933b..8029f3d6 100644
--- a/src/interfaces/tests/CMakeLists.txt
+++ b/src/interfaces/tests/CMakeLists.txt
@@ -1,5 +1,18 @@
+#
+# telekom / sysrepo-plugin-system
+#
+# This program is made available under the terms of the
+# BSD 3-Clause license which is available at
+# https://opensource.org/licenses/BSD-3-Clause
+#
+# SPDX-FileCopyrightText: 2022 Deutsche Telekom AG
+# SPDX-FileContributor: Sartura Ltd.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
 set(INTERFACES_UTEST_NAME "interfaces_utest")
 set(UTILS_MEMORY_LIBRARY_NAME  "utils_memory")
+
 # for wrapping cmocka mock functions
 set(
     INTERFACES_UTEST_LINKER_OPTIONS
@@ -11,14 +24,17 @@ add_executable(
 
     ${CMAKE_SOURCE_DIR}/src/interfaces/tests/interfaces_utest.c
 )
+
 target_include_directories(
     ${INTERFACES_UTEST_NAME}
     PUBLIC ${CMAKE_SOURCE_DIR}/src/interfaces/src
 )
+
 target_link_options(
     ${INTERFACES_UTEST_NAME}
     PRIVATE ${INTERFACES_UTEST_LINKER_OPTIONS}
 )
+
 target_link_libraries(
     ${INTERFACES_UTEST_NAME}
 
@@ -27,6 +43,7 @@ target_link_libraries(
 	${SYSREPO_LIBRARIES}
 	${LIBYANG_LIBRARIES}
 )
+
 add_test(
     NAME ${INTERFACES_UTEST_NAME}
     COMMAND interfaces_utest