--- xtract.h.orig	1992-10-30 14:20:15.000000000 -0700
+++ xtract.h	2008-11-09 18:02:47.000000000 -0700
@@ -13,6 +13,7 @@
 #endif /* __STDC__ */
 #endif /* SGI */
 #include <stdio.h>
+#include <stdlib.h>
 #include <ctype.h>
 #include <time.h>
 #ifdef _POSIX_SOURCE