diff --git a/src/newgrf_airport.cpp b/src/newgrf_airport.cpp
--- a/src/newgrf_airport.cpp
+++ b/src/newgrf_airport.cpp
@@ -7,7 +7,7 @@
* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see .
*/
-/** @file newgrf_airport.h NewGRF handling of airports. */
+/** @file newgrf_airport.cpp NewGRF handling of airports. */
#include "stdafx.h"
#include "airport.h"
diff --git a/src/newgrf_railtype.cpp b/src/newgrf_railtype.cpp
--- a/src/newgrf_railtype.cpp
+++ b/src/newgrf_railtype.cpp
@@ -1,5 +1,12 @@
/* $Id$ */
+/*
+ * This file is part of OpenTTD.
+ * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
+ * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see .
+ */
+
/** @file newgrf_railtype.cpp NewGRF handling of rail types. */
#include "stdafx.h"
diff --git a/src/newgrf_railtype.h b/src/newgrf_railtype.h
--- a/src/newgrf_railtype.h
+++ b/src/newgrf_railtype.h
@@ -1,5 +1,14 @@
/* $Id$ */
+/*
+ * This file is part of OpenTTD.
+ * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
+ * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see .
+ */
+
+/** @file newgrf_railtype.h NewGRF handling of rail types. */
+
#ifndef NEWGRF_RAILTYPE_H
#define NEWGRF_RAILTYPE_H
diff --git a/src/table/newgrf_debug_data.h b/src/table/newgrf_debug_data.h
--- a/src/table/newgrf_debug_data.h
+++ b/src/table/newgrf_debug_data.h
@@ -7,7 +7,7 @@
* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see .
*/
-/** @file newgrf_debug_data.cpp Data 'tables' for NewGRF debugging. */
+/** @file newgrf_debug_data.h Data 'tables' for NewGRF debugging. */
/* Helper for filling property tables */
#define NIP(prop, base, variable, type, name) { name, cpp_offsetof(base, variable), cpp_sizeof(base, variable), prop, type }