--- libev/event.h	2008/11/17 03:37:08	1.19
+++ libev/event.h	2009/08/03 12:12:40	1.20
@@ -37,8 +37,8 @@
  * either the BSD or the GPL.
  */
 
-#ifndef EVENT_H__
-#define EVENT_H__
+#ifndef EVENT_H_
+#define EVENT_H_
 
 #ifdef EV_H
 # include EV_H