diff --git a/gcodecheck/gcode.cpp b/gcodecheck/gcode.cpp
index 6dd548e..de94efe 100644
--- a/gcodecheck/gcode.cpp
+++ b/gcodecheck/gcode.cpp
@@ -1,3 +1,10 @@
+/*
+ * (C) Copyright 2020  -  Arjan van de Ven <arjanvandeven@gmail.com>
+ *
+ * This file is part of FenrusCNCtools
+ *
+ * SPDX-License-Identifier: GPL-3.0
+ */
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
diff --git a/gcodecheck/main.cpp b/gcodecheck/main.cpp
index 6341658..7893b46 100644
--- a/gcodecheck/main.cpp
+++ b/gcodecheck/main.cpp
@@ -1,3 +1,11 @@
+/*
+ * (C) Copyright 2020  -  Arjan van de Ven <arjanvandeven@gmail.com>
+ *
+ * This file is part of FenrusCNCtools
+ *
+ * SPDX-License-Identifier: GPL-3.0
+ */
+
 #include <stdio.h>
 #include <stdlib.h>