diff --git a/test_suite/FGTestApi/NavDataCache.cxx b/test_suite/FGTestApi/NavDataCache.cxx
index a7a14e2e6..5bfc18111 100644
--- a/test_suite/FGTestApi/NavDataCache.cxx
+++ b/test_suite/FGTestApi/NavDataCache.cxx
@@ -1,3 +1,23 @@
+/*
+ * Copyright (C) 2018 Edward d'Auvergne
+ *
+ * This file is part of the program FlightGear.
+ *
+ * This program 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, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
 #include "NavDataCache.hxx"
 
 #include <Navaids/NavDataCache.hxx>
diff --git a/test_suite/FGTestApi/NavDataCache.hxx b/test_suite/FGTestApi/NavDataCache.hxx
index c7a819281..2a2f0db05 100644
--- a/test_suite/FGTestApi/NavDataCache.hxx
+++ b/test_suite/FGTestApi/NavDataCache.hxx
@@ -1,3 +1,23 @@
+/*
+ * Copyright (C) 2018 Edward d'Auvergne
+ *
+ * This file is part of the program FlightGear.
+ *
+ * This program 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, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
 #ifndef FG_NAV_DATA_CACHE_TEST_HELPERS_HXX
 #define FG_NAV_DATA_CACHE_TEST_HELPERS_HXX