diff --git a/app/src/display/CMakeLists.txt b/app/src/display/CMakeLists.txt
index d14f7d08..3b85fc0f 100644
--- a/app/src/display/CMakeLists.txt
+++ b/app/src/display/CMakeLists.txt
@@ -1,3 +1,5 @@
+# Copyright (c) 2020 The ZMK Contributors
+# SPDX-License-Identifier: MIT
 
 target_sources_ifdef(CONFIG_ZMK_DISPLAY app PRIVATE main.c)
 target_sources_ifdef(CONFIG_ZMK_DISPLAY_STATUS_SCREEN_BUILT_IN app PRIVATE status_screen.c)
diff --git a/app/src/display/widgets/CMakeLists.txt b/app/src/display/widgets/CMakeLists.txt
index 32ef761d..1d4cca1f 100644
--- a/app/src/display/widgets/CMakeLists.txt
+++ b/app/src/display/widgets/CMakeLists.txt
@@ -1,3 +1,5 @@
+# Copyright (c) 2020 The ZMK Contributors
+# SPDX-License-Identifier: MIT
 
 target_sources_ifdef(CONFIG_ZMK_WIDGET_BATTERY_STATUS app PRIVATE battery_status.c)
 target_sources_ifdef(CONFIG_ZMK_WIDGET_OUTPUT_STATUS app PRIVATE output_status.c)