diff -burN mutt-1.4.2.1.orig/keymap.h mutt-1.4.2.1/keymap.h
--- mutt-1.4.2.1.orig/keymap.h	2005-12-29 13:19:44.000000000 +0000
+++ mutt-1.4.2.1/keymap.h	2005-12-29 13:53:00.000000000 +0000
@@ -19,6 +19,8 @@
 #ifndef KEYMAP_H
 #define KEYMAP_H
 
+#include "mapping.h"
+
 /* maximal length of a key binding sequence used for buffer in km_bindkey */
 #define MAX_SEQ 8