diff --git a/core/net/mac/contikimac.h b/core/net/mac/contikimac.h
index 96f7ff86c..e32921624 100644
--- a/core/net/mac/contikimac.h
+++ b/core/net/mac/contikimac.h
@@ -33,13 +33,13 @@
 
 /**
  * \file
- *         The Contiki power-saving MAC protocol (ContikiMAC)
+ *         Header file for the ContikiMAC radio duty cycling protocol
  * \author
  *         Adam Dunkels <adam@sics.se>
  */
 
-#ifndef __CONTIKIMAC_H__
-#define __CONTIKIMAC_H__
+#ifndef CONTIKIMAC_H
+#define CONTIKIMAC_H
 
 #include "sys/rtimer.h"
 #include "net/mac/rdc.h"
@@ -47,4 +47,4 @@
 
 extern const struct rdc_driver contikimac_driver;
 
-#endif /* __CONTIKIMAC_H__ */
+#endif /* CONTIKIMAC_H */