--- metamail/mmencode.c.orig	1994-01-26 18:47:37 UTC
+++ metamail/mmencode.c
@@ -13,6 +13,7 @@ OF THIS MATERIAL FOR ANY PURPOSE.  IT IS
 WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES.
 */
 #include <stdio.h>
+#include <stdlib.h>
 #include <config.h>
 #ifdef MSDOS
 #include <fcntl.h>
