--- gifout.c.orig 1999-11-06 22:51:34.000000000 -0800 +++ gifout.c 2019-01-01 11:31:55.652767797 -0800 @@ -44,6 +44,7 @@ */ #include <stdio.h> +#include <stdlib.h> #include "port.h" #include "gifint.h" #include "kljcpyrt.h"