diff --git a/cpu/native/tramp.S b/cpu/native/tramp.S
index 25f6de0a74..104ad7b51b 100644
--- a/cpu/native/tramp.S
+++ b/cpu/native/tramp.S
@@ -1,3 +1,11 @@
+/*
+ * Copyright (C) 2014 Ludwig Ortmann
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser General
+ * Public License. See the file LICENSE in the top level directory for more
+ * details.
+ */
+
 .text
 
 #ifdef __MACH__