diff --git a/core/net/mac/contikimac/contikimac-framer.c b/core/net/mac/contikimac/contikimac-framer.c
index cbe4c8f5f..0a47866f9 100644
--- a/core/net/mac/contikimac/contikimac-framer.c
+++ b/core/net/mac/contikimac/contikimac-framer.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014, Fraunhofer Heinrich-Hertz-Institut.
+ * Copyright (c) 2010, Swedish Institute of Computer Science.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -26,6 +26,8 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
+ * This file is part of the Contiki operating system.
+ *
  */
 
 /**
diff --git a/core/net/mac/contikimac/contikimac-framer.h b/core/net/mac/contikimac/contikimac-framer.h
index 5bc84f67f..ea9429997 100644
--- a/core/net/mac/contikimac/contikimac-framer.h
+++ b/core/net/mac/contikimac/contikimac-framer.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014, Fraunhofer Heinrich-Hertz-Institut.
+ * Copyright (c) 2010, Swedish Institute of Computer Science.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -26,6 +26,8 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
+ * This file is part of the Contiki operating system.
+ *
  */
 
 /**