diff --git a/display-daemon/ser.c b/display-daemon/ser.c
index d640eeb..1e60400 100644
--- a/display-daemon/ser.c
+++ b/display-daemon/ser.c
@@ -1,3 +1,9 @@
+/*
+ * Copyright (C) 2011 Florian Streibelt <florian@freitagsrunde.org>
+ * Licensed under GPL v3 or later
+ *
+ */
+
 #include <stdio.h>		/* Standard input/output definitions */
 #include <string.h>		/* String function definitions */
 #include <unistd.h>		/* UNIX standard function definitions */