diff --git a/include/libcamera/libcamera.h b/include/libcamera/libcamera.h
index d5b34a2c6..64857326a 100644
--- a/include/libcamera/libcamera.h
+++ b/include/libcamera/libcamera.h
@@ -1,5 +1,16 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2018, Google Inc.
+ *
+ * libcamera.h - libcamera public API
+ */
+#ifndef __LIBCAMERA_LIBCAMERA_H__
+#define __LIBCAMERA_LIBCAMERA_H__
+
 class libcamera
 {
 public:
 	void init_lib(void);
 };
+
+#endif /* __LIBCAMERA_LIBCAMERA_H__ */
diff --git a/lib/main.cpp b/lib/main.cpp
index 37f1ccce4..0059e0c91 100644
--- a/lib/main.cpp
+++ b/lib/main.cpp
@@ -1,3 +1,10 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2018, Google Inc.
+ *
+ * main.cpp - libcamera main class
+ */
+
 #include <iostream>
 #include <libcamera/libcamera.h>
 
diff --git a/test/init.cpp b/test/init.cpp
index 8c8ec9adf..97948b9c8 100644
--- a/test/init.cpp
+++ b/test/init.cpp
@@ -1,3 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2018, Google Inc.
+ *
+ * init.cpp - libcamera initialization test
+ */
+
 #include <libcamera/libcamera.h>
 
 int main(void)