--- def.h.orig	Wed Dec 11 17:22:35 2013
+++ def.h	Wed Dec 11 17:23:14 2013
@@ -13,6 +13,8 @@
 #define DEF_DEF
 #define LINT_ARGS   1		/* enable lint type checking */
 #include        <stdio.h>
+#include        <stdlib.h>
+#include        <string.h>
 
 #ifdef UNIX
 #include        <sys/types.h>