Added copyright license header
diff --git a/contiki/ctk/ctk-term-int.h b/contiki/ctk/ctk-term-int.h
index 64bbd2c..711c8ab 100644
--- a/contiki/ctk/ctk-term-int.h
+++ b/contiki/ctk/ctk-term-int.h
@@ -64,4 +64,4 @@
 
 void ctk_term_input_init();
 
-#endif /* __CTK_TERM_INT_H__ */
\ No newline at end of file
+#endif /* __CTK_TERM_INT_H__ */