diff --git a/app/include/dt-bindings/zmk/keys.h b/app/include/dt-bindings/zmk/keys.h
index d3dd6341..a3b22297 100644
--- a/app/include/dt-bindings/zmk/keys.h
+++ b/app/include/dt-bindings/zmk/keys.h
@@ -1,3 +1,8 @@
+/*
+ * Copyright (c) 2020 The ZMK Contributors
+ *
+ * SPDX-License-Identifier: MIT
+ */
 
 #pragma once
 
diff --git a/app/include/dt-bindings/zmk/kscan-mock.h b/app/include/dt-bindings/zmk/kscan-mock.h
index d481899f..eff218b2 100644
--- a/app/include/dt-bindings/zmk/kscan-mock.h
+++ b/app/include/dt-bindings/zmk/kscan-mock.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (c) 2020 The ZMK Contributors
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #define ZMK_MOCK_IS_PRESS(v) ((v & (0x01 << 31)) != 0)
diff --git a/app/include/dt-bindings/zmk/matrix-transform.h b/app/include/dt-bindings/zmk/matrix-transform.h
index 4fd3e6c9..2989cb60 100644
--- a/app/include/dt-bindings/zmk/matrix-transform.h
+++ b/app/include/dt-bindings/zmk/matrix-transform.h
@@ -1,3 +1,8 @@
+/*
+ * Copyright (c) 2020 The ZMK Contributors
+ *
+ * SPDX-License-Identifier: MIT
+ */
 
 #define KT_ROW(item) (item >> 8)
 #define KT_COL(item) (item & 0xFF)
diff --git a/app/include/dt-bindings/zmk/rgb.h b/app/include/dt-bindings/zmk/rgb.h
index c2efda88..eb721807 100644
--- a/app/include/dt-bindings/zmk/rgb.h
+++ b/app/include/dt-bindings/zmk/rgb.h
@@ -1,3 +1,8 @@
+/*
+ * Copyright (c) 2020 The ZMK Contributors
+ *
+ * SPDX-License-Identifier: MIT
+ */
 
 #define RGB_TOG 0
 #define RGB_HUI 1
diff --git a/app/include/zmk/split/bluetooth/service.h b/app/include/zmk/split/bluetooth/service.h
index 954e0cdd..c2be512f 100644
--- a/app/include/zmk/split/bluetooth/service.h
+++ b/app/include/zmk/split/bluetooth/service.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (c) 2020 The ZMK Contributors
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 int zmk_split_bt_position_pressed(u8_t position);
diff --git a/app/include/zmk/split/bluetooth/uuid.h b/app/include/zmk/split/bluetooth/uuid.h
index a8dfbf62..a31884d9 100644
--- a/app/include/zmk/split/bluetooth/uuid.h
+++ b/app/include/zmk/split/bluetooth/uuid.h
@@ -1,3 +1,9 @@
+/*
+ * Copyright (c) 2020 The ZMK Contributors
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
 #pragma once
 
 #include <bluetooth/uuid.h>