--- src/metamail/mmencode.c.orig	Wed Jan 26 18:47:37 1994
+++ src/metamail/mmencode.c	Sat Mar 17 10:51:52 2012
@@ -13,6 +13,7 @@ OF THIS MATERIAL FOR ANY PURPOSE.  IT IS PROVIDED "AS 
 WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES.
 */
 #include <stdio.h>
+#include <stdlib.h>
 #include <config.h>
 #ifdef MSDOS
 #include <fcntl.h>