--- a/master/mailbox.h	Fri Mar 19 13:27:08 2010 +0100
+++ b/master/mailbox.h	Thu Apr 29 14:05:15 2010 +0200
@@ -41,6 +41,8 @@
 
 /*****************************************************************************/
 
+/** Size of the mailbox header.
+ */
 #define EC_MBOX_HEADER_SIZE 6
 
 /*****************************************************************************/